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|
/* This file, drvrhttp.c contains driver routines for http, ftp and root
files. */
/* This file was written by Bruce O'Neel at the ISDC, Switzerland */
/* The FITSIO software is maintained by William Pence at the High Energy */
/* Astrophysic Science Archive Research Center (HEASARC) at the NASA */
/* Goddard Space Flight Center. */
/* Notes on the drivers:
The ftp driver uses passive mode exclusivly. If your remote system can't
deal with passive mode then it'll fail. Since Netscape Navigator uses
passive mode as well there shouldn't be too many ftp servers which have
problems.
The http driver works properly with 301 and 302 redirects. For many more
gory details see http://www.w3c.org/Protocols/rfc2068/rfc2068. The only
catch to the 301/302 redirects is that they have to redirect to another
http:// url. If not, things would have to change a lot in cfitsio and this
was thought to be too difficult.
Redirects look like
<HTML><HEAD>
<TITLE>301 Moved Permanently</TITLE>
</HEAD><BODY>
<H1>Moved Permanently</H1>
The document has moved <A HREF="http://heasarc.gsfc.nasa.gov/FTP/software/ftools/release/other/image.fits.gz">here</A>.<P>
</BODY></HTML>
This redirect was from apache 1.2.5 but most of the other servers produce
something very similiar. The parser for the redirects finds the first
anchor <A> tag in the body and goes there. If that wasn't what was intended
by the remote system then hopefully the error stack, which includes notes
about the redirect will help the user fix the problem.
Root protocal doesn't have any real docs, so, the emperical docs are as
follows.
First, you must use a slightly modified rootd server. The modifications
include implimentation of the stat command which returns the size of the
remote file. Without that it's impossible for cfitsio to work properly
since fitsfiles don't include any information about the size of the files
in the headers. The rootd server closes the connections on any errors,
including reading beyond the end of the file or seeking beyond the end
of the file. The rootd:// driver doesn't reopen a closed connection, if
the connection is closed you're pretty much done.
The messages are of the form
<len><opcode><optional information>
All binary information is transfered in network format, so use htonl and
ntohl to convert back and forth.
<len> :== 4 byte length, in network format, the len doesn't include the
length of <len>
<opcode> :== one of the message opcodes below, 4 bytes, network format
<optional info> :== depends on opcode
The response is of the same form with the same opcode sent. Success is
indicated by <optional info> being 0.
Root is a NFSish protocol where each read/write includes the byte
offset to read or write to. As a result, seeks will always succeed
in the driver even if they would cause a fatal error when you try
to read because you're beyond the end of the file.
There is file locking on the host such that you need to possibly
create /usr/tmp/rootdtab on the host system. There is one file per
socket connection, though the rootd daemon can support multiple
files open at once.
The messages are sent in the following order:
ROOTD_USER - user name, <optional info> is the user name, trailing
null is sent though it's not required it seems. A ROOTD_AUTH
message is returned with any sort of error meaning that the user
name is wrong.
ROOTD_PASS - password, ones complemented, stored in <optional info>. Once
again the trailing null is sent. Once again a ROOTD_AUTH message is
returned
ROOTD_OPEN - <optional info> includes filename and one of
{create|update|read} as the file mode. ~ seems to be dealt with
as the username's login directory. A ROOTD_OPEN message is
returned.
Once the file is opened any of the following can be sent:
ROOTD_STAT - file status and size
returns a message where <optional info> is the file length in bytes
ROOTD_FLUSH - flushes the file, not sure this has any real effect
on the daemon since the daemon uses open/read/write/close rather
than the buffered fopen/fread/fwrite/fclose.
ROOTD_GET - on send <optional info> includes a text message of
offset and length to get. Return is a status message first with a
status value, then, the raw bytes for the length that you
requested. It's an error to seek or read past the end of the file,
and, the rootd daemon exits and won't respond anymore. Ie, don't
do this.
ROOTD_PUT - on send <optional info> includes a text message of
offset and length to put. Then send the raw bytes you want to
write. Then recieve a status message
When you are finished then you send the message:
ROOTD_CLOSE - closes the file
Once the file is closed then the socket is closed.
Revision 1.56 2000/01/04 11:58:31 oneel
Updates so that compressed network files are dealt with regardless of
their file names and/or mime types.
Revision 1.55 2000/01/04 10:52:40 oneel
cfitsio 2.034
Revision 1.51 1999/08/10 12:13:40 oneel
Make the http code a bit less picky about the types of files it
uncompresses. Now it also uncompresses files which end in .Z or .gz.
Revision 1.50 1999/08/04 12:38:46 oneel
Don's 2.0.32 patch with dal 1.3
Revision 1.39 1998/12/02 15:31:33 oneel
Updates to drvrnet.c so that less compiler warnings would be
generated. Fixes the signal handling.
Revision 1.38 1998/11/23 10:03:24 oneel
Added in a useragent string, as suggested by:
Tim Kimball · Data Systems Division ¦ kimball@stsci.edu · 410-338-4417
Space Telescope Science Institute ¦ http://www.stsci.edu/~kimball/
3700 San Martin Drive ¦ http://archive.stsci.edu/
Baltimore MD 21218 USA ¦ http://faxafloi.stsci.edu:4547/
*/
#ifdef HAVE_NET_SERVICES
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#if defined(unix) || defined(__unix__) || defined(__unix)
#include <unistd.h>
#endif
#include <signal.h>
#include <setjmp.h>
#include "fitsio2.h"
static jmp_buf env; /* holds the jump buffer for setjmp/longjmp pairs */
static void signal_handler(int sig);
/* Network routine error codes */
#define NET_OK 0
#define NOT_INET_ADDRESS -1000
#define UNKNOWN_INET_HOST -1001
#define CONNECTION_ERROR -1002
/* Network routine constants */
#define NET_DEFAULT 0
#define NET_OOB 1
#define NET_PEEK 2
#define NETTIMEOUT 180 /* in secs */
/* local defines and variables */
#define MAXLEN 1200
#define SHORTLEN 100
static char netoutfile[MAXLEN];
#define ROOTD_USER 2000 /*user id follows */
#define ROOTD_PASS 2001 /*passwd follows */
#define ROOTD_AUTH 2002 /*authorization status (to client) */
#define ROOTD_FSTAT 2003 /*filename follows */
#define ROOTD_OPEN 2004 /*filename follows + mode */
#define ROOTD_PUT 2005 /*offset, number of bytes and buffer */
#define ROOTD_GET 2006 /*offset, number of bytes */
#define ROOTD_FLUSH 2007 /*flush file */
#define ROOTD_CLOSE 2008 /*close file */
#define ROOTD_STAT 2009 /*return rootd statistics */
#define ROOTD_ACK 2010 /*acknowledgement (all OK) */
#define ROOTD_ERR 2011 /*error code and message follow */
typedef struct /* structure containing disk file structure */
{
int sock;
LONGLONG currentpos;
} rootdriver;
static rootdriver handleTable[NMAXFILES]; /* allocate diskfile handle tables */
/* static prototypes */
static int NET_TcpConnect(char *hostname, int port);
static int NET_SendRaw(int sock, const void *buf, int length, int opt);
static int NET_RecvRaw(int sock, void *buffer, int length);
static int NET_ParseUrl(const char *url, char *proto, char *host, int *port,
char *fn);
static int CreateSocketAddress(struct sockaddr_in *sockaddrPtr,
char *host,int port);
static int ftp_status(FILE *ftp, char *statusstr);
static int http_open_network(char *url, FILE **httpfile, char *contentencoding,
int *contentlength);
static int ftp_open_network(char *url, FILE **ftpfile, FILE **command,
int *sock);
static int root_send_buffer(int sock, int op, char *buffer, int buflen);
static int root_recv_buffer(int sock, int *op, char *buffer,int buflen);
static int root_openfile(char *filename, char *rwmode, int *sock);
static int encode64(unsigned s_len, char *src, unsigned d_len, char *dst);
/***************************/
/* Static variables */
static int closehttpfile;
static int closememfile;
static int closefdiskfile;
static int closediskfile;
static int closefile;
static int closeoutfile;
static int closecommandfile;
static int closeftpfile;
static FILE *diskfile;
static FILE *outfile;
/*--------------------------------------------------------------------------*/
/* This creates a memory file handle with a copy of the URL in filename. The
file is uncompressed if necessary */
int http_open(char *filename, int rwmode, int *handle)
{
FILE *httpfile;
char contentencoding[SHORTLEN];
char newfilename[MAXLEN];
char errorstr[MAXLEN];
char recbuf[MAXLEN];
long len;
int contentlength;
int status;
char firstchar;
closehttpfile = 0;
closememfile = 0;
/* don't do r/w files */
if (rwmode != 0) {
ffpmsg("Can't open http:// type file with READWRITE access");
ffpmsg(" Specify an outfile for r/w access (http_open)");
goto error;
}
/* do the signal handler bits */
if (setjmp(env) != 0) {
/* feels like the second time */
/* this means something bad happened */
ffpmsg("Timeout (http_open)");
goto error;
}
(void) signal(SIGALRM, signal_handler);
/* Open the network connection */
/* Does the file have a .Z or .gz in it */
/* Also, if file has a '?' in it (probably cgi script) */
if (strstr(filename,".Z") || strstr(filename,".gz") ||
strstr(filename,"?")) {
alarm(NETTIMEOUT);
if (http_open_network(filename,&httpfile,contentencoding,
&contentlength)) {
alarm(0);
ffpmsg("Unable to open http file (http_open):");
ffpmsg(filename);
goto error;
}
} else {
if (strlen(filename) >= MAXLEN - 4) {
ffpmsg("http file name is too long (http_open)");
ffpmsg(filename);
goto error;
}
alarm(NETTIMEOUT);
/* Try the .gz one */
strcpy(newfilename,filename);
strcat(newfilename,".gz");
if (http_open_network(newfilename,&httpfile,contentencoding,
&contentlength)) {
alarm(0);
/* Now the .Z one */
strcpy(newfilename,filename);
strcat(newfilename,".Z");
alarm(NETTIMEOUT);
if (http_open_network(newfilename,&httpfile,contentencoding,
&contentlength)) {
alarm(0);
alarm(NETTIMEOUT);
if (http_open_network(filename,&httpfile,contentencoding,
&contentlength)) {
alarm(0);
ffpmsg("Unable to open http file (http_open)");
ffpmsg(filename);
goto error;
}
}
}
}
closehttpfile++;
/* Create the memory file */
if ((status = mem_create(filename,handle))) {
ffpmsg("Unable to create memory file (http_open)");
goto error;
}
closememfile++;
/* Now, what do we do with the file */
/* Check to see what the first character is */
firstchar = fgetc(httpfile);
ungetc(firstchar,httpfile);
if (!strcmp(contentencoding,"x-gzip") ||
!strcmp(contentencoding,"x-compress") ||
strstr(filename,".gz") ||
strstr(filename,".Z") ||
('\037' == firstchar)) {
/* do the compress dance, which is the same as the gzip dance */
/* Using the cfitsio routine */
status = 0;
/* Ok, this is a tough case, let's be arbritary and say 10*NETTIMEOUT,
Given the choices for nettimeout above they'll probaby ^C before, but
it's always worth a shot*/
alarm(NETTIMEOUT*10);
status = mem_uncompress2mem(filename, httpfile, *handle);
alarm(0);
if (status) {
ffpmsg("Error writing compressed memory file (http_open)");
ffpmsg(filename);
goto error;
}
} else {
/* It's not compressed, bad choice, but we'll copy it anyway */
if (contentlength % 2880) {
sprintf(errorstr,"Content-Length not a multiple of 2880 (http_open) %d",
contentlength);
ffpmsg(errorstr);
}
/* write a memory file */
alarm(NETTIMEOUT);
while(0 != (len = fread(recbuf,1,MAXLEN,httpfile))) {
alarm(0); /* cancel alarm */
status = mem_write(*handle,recbuf,len);
if (status) {
ffpmsg("Error copying http file into memory (http_open)");
ffpmsg(filename);
goto error;
}
alarm(NETTIMEOUT); /* rearm the alarm */
}
}
fclose(httpfile);
signal(SIGALRM, SIG_DFL);
alarm(0);
return mem_seek(*handle,0);
error:
alarm(0); /* clear it */
if (closehttpfile) {
fclose(httpfile);
}
if (closememfile) {
mem_close_free(*handle);
}
signal(SIGALRM, SIG_DFL);
return (FILE_NOT_OPENED);
}
/*--------------------------------------------------------------------------*/
/* This creates a memory file handle with a copy of the URL in filename. The
file must be compressed and is copied (still compressed) to disk first.
The compressed disk file is then uncompressed into memory (READONLY).
*/
int http_compress_open(char *url, int rwmode, int *handle)
{
FILE *httpfile;
char contentencoding[SHORTLEN];
char recbuf[MAXLEN];
long len;
int contentlength;
int ii, flen, status;
char firstchar;
closehttpfile = 0;
closediskfile = 0;
closefdiskfile = 0;
closememfile = 0;
/* cfileio made a mistake, should set the netoufile first otherwise
we don't know where to write the output file */
flen = strlen(netoutfile);
if (!flen) {
ffpmsg
("Output file not set, shouldn't have happened (http_compress_open)");
goto error;
}
if (rwmode != 0) {
ffpmsg("Can't open compressed http:// type file with READWRITE access");
ffpmsg(" Specify an UNCOMPRESSED outfile (http_compress_open)");
goto error;
}
/* do the signal handler bits */
if (setjmp(env) != 0) {
/* feels like the second time */
/* this means something bad happened */
ffpmsg("Timeout (http_open)");
goto error;
}
signal(SIGALRM, signal_handler);
/* Open the http connectin */
alarm(NETTIMEOUT);
if ((status = http_open_network(url,&httpfile,contentencoding,
&contentlength))) {
alarm(0);
ffpmsg("Unable to open http file (http_compress_open)");
ffpmsg(url);
goto error;
}
closehttpfile++;
/* Better be compressed */
firstchar = fgetc(httpfile);
ungetc(firstchar,httpfile);
if (!strcmp(contentencoding,"x-gzip") ||
!strcmp(contentencoding,"x-compress") ||
('\037' == firstchar)) {
if (*netoutfile == '!')
{
/* user wants to clobber file, if it already exists */
for (ii = 0; ii < flen; ii++)
netoutfile[ii] = netoutfile[ii + 1]; /* remove '!' */
status = file_remove(netoutfile);
}
/* Create the new file */
if ((status = file_create(netoutfile,handle))) {
ffpmsg("Unable to create output disk file (http_compress_open):");
ffpmsg(netoutfile);
goto error;
}
closediskfile++;
/* write a file */
alarm(NETTIMEOUT);
while(0 != (len = fread(recbuf,1,MAXLEN,httpfile))) {
alarm(0);
status = file_write(*handle,recbuf,len);
if (status) {
ffpmsg("Error writing disk file (http_compres_open)");
ffpmsg(netoutfile);
goto error;
}
alarm(NETTIMEOUT);
}
file_close(*handle);
fclose(httpfile);
closehttpfile--;
closediskfile--;
/* File is on disk, let's uncompress it into memory */
if (NULL == (diskfile = fopen(netoutfile,"r"))) {
ffpmsg("Unable to reopen disk file (http_compress_open)");
ffpmsg(netoutfile);
goto error;
}
closefdiskfile++;
/* Create the memory handle to hold it */
if ((status = mem_create(url,handle))) {
ffpmsg("Unable to create memory file (http_compress_open)");
goto error;
}
closememfile++;
/* Uncompress it */
status = 0;
status = mem_uncompress2mem(url,diskfile,*handle);
fclose(diskfile);
closefdiskfile--;
if (status) {
ffpmsg("Error uncompressing disk file to memory (http_compress_open)");
ffpmsg(netoutfile);
goto error;
}
} else {
/* Opps, this should not have happened */
ffpmsg("Can only have compressed files here (http_compress_open)");
goto error;
}
signal(SIGALRM, SIG_DFL);
alarm(0);
return mem_seek(*handle,0);
error:
alarm(0); /* clear it */
if (closehttpfile) {
fclose(httpfile);
}
if (closefdiskfile) {
fclose(diskfile);
}
if (closememfile) {
mem_close_free(*handle);
}
if (closediskfile) {
file_close(*handle);
}
signal(SIGALRM, SIG_DFL);
return (FILE_NOT_OPENED);
}
/*--------------------------------------------------------------------------*/
/* This creates a file handle with a copy of the URL in filename. The http
file is copied to disk first. If it's compressed then it is
uncompressed when copying to the disk */
int http_file_open(char *url, int rwmode, int *handle)
{
FILE *httpfile;
char contentencoding[SHORTLEN];
char errorstr[MAXLEN];
char recbuf[MAXLEN];
long len;
int contentlength;
int ii, flen, status;
char firstchar;
/* Check if output file is actually a memory file */
if (!strncmp(netoutfile, "mem:", 4) )
{
/* allow the memory file to be opened with write access */
return( http_open(url, READONLY, handle) );
}
closehttpfile = 0;
closefile = 0;
closeoutfile = 0;
/* cfileio made a mistake, we need to know where to write the file */
flen = strlen(netoutfile);
if (!flen) {
ffpmsg("Output file not set, shouldn't have happened (http_file_open)");
return (FILE_NOT_OPENED);
}
/* do the signal handler bits */
if (setjmp(env) != 0) {
/* feels like the second time */
/* this means something bad happened */
ffpmsg("Timeout (http_open)");
goto error;
}
signal(SIGALRM, signal_handler);
/* Open the network connection */
alarm(NETTIMEOUT);
if ((status = http_open_network(url,&httpfile,contentencoding,
&contentlength))) {
alarm(0);
ffpmsg("Unable to open http file (http_file_open)");
ffpmsg(url);
goto error;
}
closehttpfile++;
if (*netoutfile == '!')
{
/* user wants to clobber disk file, if it already exists */
for (ii = 0; ii < flen; ii++)
netoutfile[ii] = netoutfile[ii + 1]; /* remove '!' */
status = file_remove(netoutfile);
}
firstchar = fgetc(httpfile);
ungetc(firstchar,httpfile);
if (!strcmp(contentencoding,"x-gzip") ||
!strcmp(contentencoding,"x-compress") ||
('\037' == firstchar)) {
/* to make this more cfitsioish we use the file driver calls to create
the disk file */
/* Create the output file */
if ((status = file_create(netoutfile,handle))) {
ffpmsg("Unable to create output file (http_file_open)");
ffpmsg(netoutfile);
goto error;
}
file_close(*handle);
if (NULL == (outfile = fopen(netoutfile,"w"))) {
ffpmsg("Unable to reopen the output file (http_file_open)");
ffpmsg(netoutfile);
goto error;
}
closeoutfile++;
status = 0;
/* Ok, this is a tough case, let's be arbritary and say 10*NETTIMEOUT,
Given the choices for nettimeout above they'll probaby ^C before, but
it's always worth a shot*/
alarm(NETTIMEOUT*10);
status = uncompress2file(url,httpfile,outfile,&status);
alarm(0);
if (status) {
ffpmsg("Error uncompressing http file to disk file (http_file_open)");
ffpmsg(url);
ffpmsg(netoutfile);
goto error;
}
fclose(outfile);
closeoutfile--;
} else {
/* Create the output file */
if ((status = file_create(netoutfile,handle))) {
ffpmsg("Unable to create output file (http_file_open)");
ffpmsg(netoutfile);
goto error;
}
/* Give a warning message. This could just be bad padding at the end
so don't treat it like an error. */
closefile++;
if (contentlength % 2880) {
sprintf(errorstr,
"Content-Length not a multiple of 2880 (http_file_open) %d",
contentlength);
ffpmsg(errorstr);
}
/* write a file */
alarm(NETTIMEOUT);
while(0 != (len = fread(recbuf,1,MAXLEN,httpfile))) {
alarm(0);
status = file_write(*handle,recbuf,len);
if (status) {
ffpmsg("Error copying http file to disk file (http_file_open)");
ffpmsg(url);
ffpmsg(netoutfile);
goto error;
}
}
file_close(*handle);
closefile--;
}
fclose(httpfile);
closehttpfile--;
signal(SIGALRM, SIG_DFL);
alarm(0);
return file_open(netoutfile,rwmode,handle);
error:
alarm(0); /* clear it */
if (closehttpfile) {
fclose(httpfile);
}
if (closeoutfile) {
fclose(outfile);
}
if (closefile) {
file_close(*handle);
}
signal(SIGALRM, SIG_DFL);
return (FILE_NOT_OPENED);
}
/*--------------------------------------------------------------------------*/
/* This is the guts of the code to get a file via http.
url is the input url
httpfile is set to be the file connected to the socket which you can
read the file from
contentencoding is the mime type of the file, returned if the http server
returns it
contentlength is the lenght of the file, returned if the http server returns
it
*/
static int http_open_network(char *url, FILE **httpfile, char *contentencoding,
int *contentlength)
{
int status;
int sock;
int tmpint;
char recbuf[MAXLEN];
char tmpstr[MAXLEN];
char tmpstr1[SHORTLEN];
char tmpstr2[MAXLEN];
char errorstr[MAXLEN];
char proto[SHORTLEN];
char host[SHORTLEN];
char userpass[MAXLEN];
char fn[MAXLEN];
char turl[MAXLEN];
char *scratchstr;
int port;
float version;
char pproto[SHORTLEN];
char phost[SHORTLEN]; /* address of the proxy server */
int pport; /* port number of the proxy server */
char pfn[MAXLEN];
char *proxy; /* URL of the proxy server */
/* Parse the URL apart again */
strcpy(turl,"http://");
strncat(turl,url,MAXLEN - 8);
if (NET_ParseUrl(turl,proto,host,&port,fn)) {
sprintf(errorstr,"URL Parse Error (http_open) %s",url);
ffpmsg(errorstr);
return (FILE_NOT_OPENED);
}
/* Do we have a user:password combo ? */
strcpy(userpass, url);
if ((scratchstr = strchr(userpass, '@')) != NULL) {
*scratchstr = '\0';
} else
strcpy(userpass, "");
/* Ph. Prugniel 2003/04/03
Are we using a proxy?
We use a proxy if the environment variable "http_proxy" is set to an
address, eg. http://wwwcache.nottingham.ac.uk:3128
("http_proxy" is also used by wget)
*/
proxy = getenv("http_proxy");
/* Connect to the remote host */
if (proxy) {
if (NET_ParseUrl(proxy,pproto,phost,&pport,pfn)) {
sprintf(errorstr,"URL Parse Error (http_open) %s",proxy);
ffpmsg(errorstr);
return (FILE_NOT_OPENED);
}
sock = NET_TcpConnect(phost,pport);
}
else
sock = NET_TcpConnect(host,port);
if (sock < 0) {
if (proxy) {
ffpmsg("Couldn't connect to host via proxy server (http_open_network)");
ffpmsg(proxy);
}
return (FILE_NOT_OPENED);
}
/* Make the socket a stdio file */
if (NULL == (*httpfile = fdopen(sock,"r"))) {
ffpmsg ("fdopen failed to convert socket to file (http_open_network)");
close(sock);
return (FILE_NOT_OPENED);
}
/* Send the GET request to the remote server */
/* Ph. Prugniel 2003/04/03
One must add the Host: command because of HTTP 1.1 servers (ie. virtual
hosts) */
if (proxy)
sprintf(tmpstr,"GET http://%s:%-d%s HTTP/1.0\r\n",host,port,fn);
else
sprintf(tmpstr,"GET %s HTTP/1.0\r\n",fn);
if (strcmp(userpass, "")) {
encode64(strlen(userpass), userpass, MAXLEN, tmpstr2);
sprintf(tmpstr1, "Authorization: Basic %s\r\n", tmpstr2);
if (strlen(tmpstr) + strlen(tmpstr1) > MAXLEN - 1)
return (FILE_NOT_OPENED);
strcat(tmpstr,tmpstr1);
}
sprintf(tmpstr1,"User-Agent: HEASARC/CFITSIO/%-8.3f\r\n",ffvers(&version));
if (strlen(tmpstr) + strlen(tmpstr1) > MAXLEN - 1)
return (FILE_NOT_OPENED);
strcat(tmpstr,tmpstr1);
/* HTTP 1.1 servers require the following 'Host: ' string */
sprintf(tmpstr1,"Host: %s:%-d\r\n\r\n",host,port);
if (strlen(tmpstr) + strlen(tmpstr1) > MAXLEN - 1)
return (FILE_NOT_OPENED);
strcat(tmpstr,tmpstr1);
status = NET_SendRaw(sock,tmpstr,strlen(tmpstr),NET_DEFAULT);
/* read the header */
if (!(fgets(recbuf,MAXLEN,*httpfile))) {
sprintf (errorstr,"http header short (http_open_network) %s",recbuf);
ffpmsg(errorstr);
fclose(*httpfile);
return (FILE_NOT_OPENED);
}
*contentlength = 0;
contentencoding[0] = '\0';
/* Our choices are 200, ok, 301, temporary redirect, or 302 perm redirect */
sscanf(recbuf,"%s %d",tmpstr,&status);
if (status != 200){
if (status == 301 || status == 302) {
/* got a redirect */
if (status == 301) {
ffpmsg("Note: Web server replied with a temporary redirect from");
} else {
ffpmsg("Note: Web server replied with a redirect from");
}
ffpmsg(turl);
/* now, let's not write the most sophisticated parser here */
while (fgets(recbuf,MAXLEN,*httpfile)) {
scratchstr = strstr(recbuf,"<A HREF=\"");
if (scratchstr != NULL) {
/* Ok, we found the beginning of the anchor */
scratchstr += 9; /* skip the <A HREF=" bits */
scratchstr += 7; /* skip http://, we die if it's really ftp:// */
strcpy(turl,strtok(scratchstr,"\""));
sprintf(errorstr,"to %s\n",turl);
ffpmsg(errorstr);
fclose (*httpfile);
return
http_open_network(turl,httpfile,contentencoding,contentlength);
}
}
/* if we get here then we couldnt' decide the redirect */
ffpmsg("but we were unable to find the redirected url in the servers response");
}
/* sprintf(errorstr,
"(http_open_network) Status not 200, was %d\nLine was %s\n",
status,recbuf);
ffpmsg(errorstr);
*/
fclose(*httpfile);
return (FILE_NOT_OPENED);
}
/* from here the first word holds the keyword we want */
/* so, read the rest of the header */
while (fgets(recbuf,MAXLEN,*httpfile)) {
/* Blank line ends the header */
if (*recbuf == '\r') break;
if (strlen(recbuf) > 3) {
recbuf[strlen(recbuf)-1] = '\0';
recbuf[strlen(recbuf)-1] = '\0';
}
sscanf(recbuf,"%s %d",tmpstr,&tmpint);
/* Did we get a content-length header ? */
if (!strcmp(tmpstr,"Content-Length:")) {
*contentlength = tmpint;
}
/* Did we get the content-encoding header ? */
if (!strcmp(tmpstr,"Content-Encoding:")) {
if (NULL != (scratchstr = strstr(recbuf,":"))) {
/* Found the : */
scratchstr++; /* skip the : */
scratchstr++; /* skip the extra space */
strcpy(contentencoding,scratchstr);
}
}
}
/* we're done, so return */
return 0;
}
/*--------------------------------------------------------------------------*/
/* This creates a memory file handle with a copy of the URL in filename. The
file is uncompressed if necessary */
int ftp_open(char *filename, int rwmode, int *handle)
{
FILE *ftpfile;
FILE *command;
int sock;
char newfilename[MAXLEN];
char recbuf[MAXLEN];
long len;
int status;
char firstchar;
closememfile = 0;
closecommandfile = 0;
closeftpfile = 0;
/* don't do r/w files */
if (rwmode != 0) {
ffpmsg("Can't open ftp:// type file with READWRITE access");
ffpmsg("Specify an outfile for r/w access (ftp_open)");
return (FILE_NOT_OPENED);
}
/* do the signal handler bits */
if (setjmp(env) != 0) {
/* feels like the second time */
/* this means something bad happened */
ffpmsg("Timeout (http_open)");
goto error;
}
signal(SIGALRM, signal_handler);
/* Open the ftp connetion. ftpfile is connected to the file port,
command is connected to port 21. sock is the socket on port 21 */
if (strlen(filename) > MAXLEN - 4) {
ffpmsg("filename too long (ftp_open)");
ffpmsg(filename);
goto error;
}
alarm(NETTIMEOUT);
strcpy(newfilename,filename);
/* Does the file have a .Z or .gz in it */
if (strstr(newfilename,".Z") || strstr(newfilename,".gz")) {
alarm(NETTIMEOUT);
if (ftp_open_network(filename,&ftpfile,&command,&sock)) {
alarm(0);
ffpmsg("Unable to open ftp file (ftp_open)");
ffpmsg(filename);
goto error;
}
} else {
/* Try the .gz one */
strcpy(newfilename,filename);
strcat(newfilename,".gz");
alarm(NETTIMEOUT);
if (ftp_open_network(newfilename,&ftpfile,&command,&sock)) {
alarm(0);
strcpy(newfilename,filename);
strcat(newfilename,".Z");
alarm(NETTIMEOUT);
if (ftp_open_network(newfilename,&ftpfile,&command,&sock)) {
/* Now as given */
alarm(0);
strcpy(newfilename,filename);
alarm(NETTIMEOUT);
if (ftp_open_network(newfilename,&ftpfile,&command,&sock)) {
alarm(0);
ffpmsg("Unable to open ftp file (ftp_open)");
ffpmsg(newfilename);
goto error;
}
}
}
}
closeftpfile++;
closecommandfile++;
/* create the memory file */
if ((status = mem_create(filename,handle))) {
ffpmsg ("Could not create memory file to passive port (ftp_open)");
ffpmsg(filename);
goto error;
}
closememfile++;
/* This isn't quite right, it'll fail if the file has .gzabc at the end
for instance */
/* Decide if the file is compressed */
firstchar = fgetc(ftpfile);
ungetc(firstchar,ftpfile);
if (strstr(newfilename,".gz") ||
strstr(newfilename,".Z") ||
('\037' == firstchar)) {
status = 0;
/* A bit arbritary really, the user will probably hit ^C */
alarm(NETTIMEOUT*10);
status = mem_uncompress2mem(filename, ftpfile, *handle);
alarm(0);
if (status) {
ffpmsg("Error writing compressed memory file (ftp_open)");
ffpmsg(filename);
goto error;
}
} else {
/* write a memory file */
alarm(NETTIMEOUT);
while(0 != (len = fread(recbuf,1,MAXLEN,ftpfile))) {
alarm(0);
status = mem_write(*handle,recbuf,len);
if (status) {
ffpmsg("Error writing memory file (http_open)");
ffpmsg(filename);
goto error;
}
alarm(NETTIMEOUT);
}
}
/* close and clean up */
fclose(ftpfile);
closeftpfile--;
NET_SendRaw(sock,"QUIT\n",5,NET_DEFAULT);
fclose(command);
closecommandfile--;
signal(SIGALRM, SIG_DFL);
alarm(0);
return mem_seek(*handle,0);
error:
alarm(0); /* clear it */
if (closecommandfile) {
fclose(command);
}
if (closeftpfile) {
fclose(ftpfile);
}
if (closememfile) {
mem_close_free(*handle);
}
signal(SIGALRM, SIG_DFL);
return (FILE_NOT_OPENED);
}
/*--------------------------------------------------------------------------*/
/* This creates a file handle with a copy of the URL in filename. The
file must be uncompressed and is copied to disk first */
int ftp_file_open(char *url, int rwmode, int *handle)
{
FILE *ftpfile;
FILE *command;
char recbuf[MAXLEN];
long len;
int sock;
int ii, flen, status;
char firstchar;
/* Check if output file is actually a memory file */
if (!strncmp(netoutfile, "mem:", 4) )
{
/* allow the memory file to be opened with write access */
return( ftp_open(url, READONLY, handle) );
}
closeftpfile = 0;
closecommandfile = 0;
closefile = 0;
closeoutfile = 0;
/* cfileio made a mistake, need to know where to write the output file */
flen = strlen(netoutfile);
if (!flen)
{
ffpmsg("Output file not set, shouldn't have happened (ftp_file_open)");
return (FILE_NOT_OPENED);
}
/* do the signal handler bits */
if (setjmp(env) != 0) {
/* feels like the second time */
/* this means something bad happened */
ffpmsg("Timeout (http_open)");
goto error;
}
signal(SIGALRM, signal_handler);
/* open the network connection to url. ftpfile holds the connection to
the input file, command holds the connection to port 21, and sock is
the socket connected to port 21 */
alarm(NETTIMEOUT);
if ((status = ftp_open_network(url,&ftpfile,&command,&sock))) {
alarm(0);
ffpmsg("Unable to open http file (ftp_file_open)");
ffpmsg(url);
goto error;
}
closeftpfile++;
closecommandfile++;
if (*netoutfile == '!')
{
/* user wants to clobber file, if it already exists */
for (ii = 0; ii < flen; ii++)
netoutfile[ii] = netoutfile[ii + 1]; /* remove '!' */
status = file_remove(netoutfile);
}
/* Now, what do we do with the file */
firstchar = fgetc(ftpfile);
ungetc(firstchar,ftpfile);
if (strstr(url,".gz") ||
strstr(url,".Z") ||
('\037' == firstchar)) {
/* to make this more cfitsioish we use the file driver calls to create
the file */
/* Create the output file */
if ((status = file_create(netoutfile,handle))) {
ffpmsg("Unable to create output file (ftp_file_open)");
ffpmsg(netoutfile);
goto error;
}
file_close(*handle);
if (NULL == (outfile = fopen(netoutfile,"w"))) {
ffpmsg("Unable to reopen the output file (ftp_file_open)");
ffpmsg(netoutfile);
goto error;
}
closeoutfile++;
status = 0;
/* Ok, this is a tough case, let's be arbritary and say 10*NETTIMEOUT,
Given the choices for nettimeout above they'll probaby ^C before, but
it's always worth a shot*/
alarm(NETTIMEOUT*10);
status = uncompress2file(url,ftpfile,outfile,&status);
alarm(0);
if (status) {
ffpmsg("Unable to uncompress the output file (ftp_file_open)");
ffpmsg(url);
ffpmsg(netoutfile);
goto error;
}
fclose(outfile);
closeoutfile--;
} else {
/* Create the output file */
if ((status = file_create(netoutfile,handle))) {
ffpmsg("Unable to create output file (ftp_file_open)");
ffpmsg(netoutfile);
goto error;
}
closefile++;
/* write a file */
alarm(NETTIMEOUT);
while(0 != (len = fread(recbuf,1,MAXLEN,ftpfile))) {
alarm(0);
status = file_write(*handle,recbuf,len);
if (status) {
ffpmsg("Error writing file (ftp_file_open)");
ffpmsg(url);
ffpmsg(netoutfile);
goto error;
}
alarm(NETTIMEOUT);
}
file_close(*handle);
}
fclose(ftpfile);
closeftpfile--;
NET_SendRaw(sock,"QUIT\n",5,NET_DEFAULT);
fclose(command);
closecommandfile--;
signal(SIGALRM, SIG_DFL);
alarm(0);
return file_open(netoutfile,rwmode,handle);
error:
alarm(0); /* clear it */
if (closeftpfile) {
fclose(ftpfile);
}
if (closecommandfile) {
fclose(command);
}
if (closeoutfile) {
fclose(outfile);
}
if (closefile) {
file_close(*handle);
}
signal(SIGALRM, SIG_DFL);
return (FILE_NOT_OPENED);
}
/*--------------------------------------------------------------------------*/
/* This creates a memory handle with a copy of the URL in filename. The
file must be compressed and is copied to disk first */
int ftp_compress_open(char *url, int rwmode, int *handle)
{
FILE *ftpfile;
FILE *command;
char recbuf[MAXLEN];
long len;
int ii, flen, status;
int sock;
char firstchar;
closeftpfile = 0;
closecommandfile = 0;
closememfile = 0;
closefdiskfile = 0;
closediskfile = 0;
/* don't do r/w files */
if (rwmode != 0) {
ffpmsg("Compressed files must be r/o");
return (FILE_NOT_OPENED);
}
/* Need to know where to write the output file */
flen = strlen(netoutfile);
if (!flen)
{
ffpmsg(
"Output file not set, shouldn't have happened (ftp_compress_open)");
return (FILE_NOT_OPENED);
}
/* do the signal handler bits */
if (setjmp(env) != 0) {
/* feels like the second time */
/* this means something bad happened */
ffpmsg("Timeout (http_open)");
goto error;
}
signal(SIGALRM, signal_handler);
/* Open the network connection to url, ftpfile is connected to the file
port, command is connected to port 21. sock is for writing to port 21 */
alarm(NETTIMEOUT);
if ((status = ftp_open_network(url,&ftpfile,&command,&sock))) {
alarm(0);
ffpmsg("Unable to open ftp file (ftp_compress_open)");
ffpmsg(url);
goto error;
}
closeftpfile++;
closecommandfile++;
/* Now, what do we do with the file */
firstchar = fgetc(ftpfile);
ungetc(firstchar,ftpfile);
if (strstr(url,".gz") ||
strstr(url,".Z") ||
('\037' == firstchar)) {
if (*netoutfile == '!')
{
/* user wants to clobber file, if it already exists */
for (ii = 0; ii < flen; ii++)
netoutfile[ii] = netoutfile[ii + 1]; /* remove '!' */
status = file_remove(netoutfile);
}
/* Create the output file */
if ((status = file_create(netoutfile,handle))) {
ffpmsg("Unable to create output file (ftp_compress_open)");
ffpmsg(netoutfile);
goto error;
}
closediskfile++;
/* write a file */
alarm(NETTIMEOUT);
while(0 != (len = fread(recbuf,1,MAXLEN,ftpfile))) {
alarm(0);
status = file_write(*handle,recbuf,len);
if (status) {
ffpmsg("Error writing file (ftp_compres_open)");
ffpmsg(url);
ffpmsg(netoutfile);
goto error;
}
alarm(NETTIMEOUT);
}
file_close(*handle);
closediskfile--;
fclose(ftpfile);
closeftpfile--;
/* Close down the ftp connection */
NET_SendRaw(sock,"QUIT\n",5,NET_DEFAULT);
fclose(command);
closecommandfile--;
/* File is on disk, let's uncompress it into memory */
if (NULL == (diskfile = fopen(netoutfile,"r"))) {
ffpmsg("Unable to reopen disk file (ftp_compress_open)");
ffpmsg(netoutfile);
return (FILE_NOT_OPENED);
}
closefdiskfile++;
if ((status = mem_create(url,handle))) {
ffpmsg("Unable to create memory file (ftp_compress_open)");
ffpmsg(url);
goto error;
}
closememfile++;
status = 0;
status = mem_uncompress2mem(url,diskfile,*handle);
fclose(diskfile);
closefdiskfile--;
if (status) {
ffpmsg("Error writing compressed memory file (ftp_compress_open)");
goto error;
}
} else {
/* Opps, this should not have happened */
ffpmsg("Can only compressed files here (ftp_compress_open)");
goto error;
}
signal(SIGALRM, SIG_DFL);
alarm(0);
return mem_seek(*handle,0);
error:
alarm(0); /* clear it */
if (closeftpfile) {
fclose(ftpfile);
}
if (closecommandfile) {
fclose(command);
}
if (closefdiskfile) {
fclose(diskfile);
}
if (closememfile) {
mem_close_free(*handle);
}
if (closediskfile) {
file_close(*handle);
}
signal(SIGALRM, SIG_DFL);
return (FILE_NOT_OPENED);
}
/*--------------------------------------------------------------------------*/
/* Open a ftp connection to filename (really a URL), return ftpfile set to
the file connection, and command set to the control connection, with sock
also set to the control connection */
int ftp_open_network(char *filename, FILE **ftpfile, FILE **command, int *sock)
{
int status;
int sock1;
int tmpint;
char recbuf[MAXLEN];
char errorstr[MAXLEN];
char tmpstr[MAXLEN];
char proto[SHORTLEN];
char host[SHORTLEN];
char *newhost;
char *username;
char *password;
char fn[MAXLEN];
char *newfn;
char *passive;
char *tstr;
char ip[SHORTLEN];
char turl[MAXLEN];
int port;
/* parse the URL */
if (strlen(filename) > MAXLEN - 7) {
ffpmsg("ftp filename is too long (ftp_open)");
return (FILE_NOT_OPENED);
}
strcpy(turl,"ftp://");
strcat(turl,filename);
if (NET_ParseUrl(turl,proto,host,&port,fn)) {
sprintf(errorstr,"URL Parse Error (ftp_open) %s",filename);
ffpmsg(errorstr);
return (FILE_NOT_OPENED);
}
#ifdef DEBUG
printf ("proto, %s, host, %s, port %d, fn %s\n",proto,host,port,fn);
#endif
port = 21;
/* we might have a user name */
username = "anonymous";
password = "user@host.com";
/* is there an @ sign */
if (NULL != (newhost = strrchr(host,'@'))) {
*newhost = '\0'; /* make it a null, */
newhost++; /* Now newhost points to the host name and host points to the
user name, password combo */
username = host;
/* is there a : for a password */
if (NULL != strchr(username,':')) {
password = strchr(username,':');
*password = '\0';
password++;
}
} else {
newhost = host;
}
#ifdef DEBUG
printf("User %s pass %s\n",username,password);
#endif
/* Connect to the host on the required port */
*sock = NET_TcpConnect(newhost,port);
/* convert it to a stdio file */
if (NULL == (*command = fdopen(*sock,"r"))) {
ffpmsg ("fdopen failed to convert socket to stdio file (ftp_open)");
return (FILE_NOT_OPENED);
}
/* Wait for the 220 response */
if (ftp_status(*command,"220 ")) {
ffpmsg ("error connecting to remote server, no 220 seen (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
/* Send the user name and wait for the right response */
sprintf(tmpstr,"USER %s\n",username);
status = NET_SendRaw(*sock,tmpstr,strlen(tmpstr),NET_DEFAULT);
if (ftp_status(*command,"331 ")) {
ffpmsg ("USER error no 331 seen (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
/* Send the password and wait for the right response */
sprintf(tmpstr,"PASS %s\n",password);
status = NET_SendRaw(*sock,tmpstr,strlen(tmpstr),NET_DEFAULT);
if (ftp_status(*command,"230 ")) {
ffpmsg ("PASS error, no 230 seen (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
/* now do the cwd command */
newfn = strrchr(fn,'/');
if (newfn == NULL) {
strcpy(tmpstr,"CWD /\n");
newfn = fn;
} else {
*newfn = '\0';
newfn++;
if (strlen(fn) == 0) {
strcpy(tmpstr,"CWD /\n");
} else {
/* remove the leading slash */
if (fn[0] == '/') {
sprintf(tmpstr,"CWD %s\n",&fn[1]);
} else {
sprintf(tmpstr,"CWD %s\n",fn);
}
}
}
#ifdef DEBUG
printf("CWD command is %s\n",tmpstr);
#endif
status = NET_SendRaw(*sock,tmpstr,strlen(tmpstr),NET_DEFAULT);
if (ftp_status(*command,"250 ")) {
ffpmsg ("CWD error, no 250 seen (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
if (!strlen(newfn)) {
ffpmsg("Null file name (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
/* Always use binary mode */
sprintf(tmpstr,"TYPE I\n");
status = NET_SendRaw(*sock,tmpstr,strlen(tmpstr),NET_DEFAULT);
if (ftp_status(*command,"200 ")) {
ffpmsg ("TYPE I error, 200 not seen (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
status = NET_SendRaw(*sock,"PASV\n",5,NET_DEFAULT);
if (!(fgets(recbuf,MAXLEN,*command))) {
ffpmsg ("PASV error (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
/* Passive mode response looks like
227 Entering Passive Mode (129,194,67,8,210,80) */
if (recbuf[0] == '2' && recbuf[1] == '2' && recbuf[2] == '7') {
/* got a good passive mode response, find the opening ( */
if (!(passive = strchr(recbuf,'('))) {
ffpmsg ("PASV error (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
*passive = '\0';
passive++;
ip[0] = '\0';
/* Messy parsing of response from PASV *command */
if (!(tstr = strtok(passive,",)"))) {
ffpmsg ("PASV error (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
strcpy(ip,tstr);
strcat(ip,".");
if (!(tstr = strtok(NULL,",)"))) {
ffpmsg ("PASV error (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
strcat(ip,tstr);
strcat(ip,".");
if (!(tstr = strtok(NULL,",)"))) {
ffpmsg ("PASV error (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
strcat(ip,tstr);
strcat(ip,".");
if (!(tstr = strtok(NULL,",)"))) {
ffpmsg ("PASV error (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
strcat(ip,tstr);
/* Done the ip number, now do the port # */
if (!(tstr = strtok(NULL,",)"))) {
ffpmsg ("PASV error (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
sscanf(tstr,"%d",&port);
port *= 256;
if (!(tstr = strtok(NULL,",)"))) {
ffpmsg ("PASV error (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
sscanf(tstr,"%d",&tmpint);
port += tmpint;
if (!strlen(newfn)) {
ffpmsg("Null file name (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
#ifdef DEBUG
puts("connection to passive port");
#endif
/* COnnect to the data port */
sock1 = NET_TcpConnect(ip,port);
if (NULL == (*ftpfile = fdopen(sock1,"r"))) {
ffpmsg ("Could not connect to passive port (ftp_open)");
fclose(*command);
return (FILE_NOT_OPENED);
}
/* now we return */
/* Send the retrieve command */
sprintf(tmpstr,"RETR %s\n",newfn);
status = NET_SendRaw(*sock,tmpstr,strlen(tmpstr),NET_DEFAULT);
#ifdef DEBUG
puts("Sent RETR command");
#endif
if (ftp_status(*command,"150 ")) {
/* ffpmsg ("RETR error, most likely file is not there (ftp_open)"); */
fclose(*command);
#ifdef DEBUG
puts("File not there");
#endif
return (FILE_NOT_OPENED);
}
return 0;
}
/* no passive mode */
NET_SendRaw(*sock,"QUIT\n",5,NET_DEFAULT);
fclose(*command);
return (FILE_NOT_OPENED);
}
/*--------------------------------------------------------------------------*/
/* return a socket which results from connection to hostname on port port */
static int NET_TcpConnect(char *hostname, int port)
{
/* Connect to hostname on port */
struct sockaddr_in sockaddr;
int sock;
int stat;
int val = 1;
CreateSocketAddress(&sockaddr,hostname,port);
/* Create socket */
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
ffpmsg("Can't create socket");
return CONNECTION_ERROR;
}
if ((stat = connect(sock, (struct sockaddr*) &sockaddr,
sizeof(sockaddr)))
< 0) {
close(sock);
/*
perror("NET_Tcpconnect - Connection error");
ffpmsg("Can't connect to host, connection error");
*/
return CONNECTION_ERROR;
}
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (char *)&val, sizeof(val));
val = 65536;
setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&val, sizeof(val));
setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&val, sizeof(val));
return sock;
}
/*--------------------------------------------------------------------------*/
/* Write len bytes from buffer to socket sock */
static int NET_SendRaw(int sock, const void *buffer, int length, int opt)
{
char * buf = (char *) buffer;
int flag;
int n, nsent = 0;
switch (opt) {
case NET_DEFAULT:
flag = 0;
break;
case NET_OOB:
flag = MSG_OOB;
break;
case NET_PEEK:
default:
flag = 0;
break;
}
if (sock < 0) return -1;
for (n = 0; n < length; n += nsent) {
if ((nsent = send(sock, buf+n, length-n, flag)) <= 0) {
return nsent;
}
#ifdef DEBUG
printf ("send raw, sent %d bytes\n",nsent);
#endif
}
#ifdef DEBUG
printf ("send raw end, sent %d bytes\n",n);
#endif
return n;
}
/*--------------------------------------------------------------------------*/
static int NET_RecvRaw(int sock, void *buffer, int length)
{
/* Receive exactly length bytes into buffer. Returns number of bytes */
/* received. Returns -1 in case of error. */
int nrecv, n;
char *buf = (char *)buffer;
if (sock < 0) return -1;
for (n = 0; n < length; n += nrecv) {
while ((nrecv = recv(sock, buf+n, length-n, 0)) == -1 && errno == EINTR)
errno = 0; /* probably a SIGCLD that was caught */
if (nrecv < 0)
return nrecv;
else if (nrecv == 0)
break; /*/ EOF */
}
return n;
}
/*--------------------------------------------------------------------------*/
/* Yet Another URL Parser
url - input url
proto - input protocol
host - output host
port - output port
fn - output filename
*/
static int NET_ParseUrl(const char *url, char *proto, char *host, int *port,
char *fn)
{
/* parses urls into their bits */
/* returns 1 if error, else 0 */
char *urlcopy, *urlcopyorig;
char *ptrstr;
char *thost;
int isftp = 0;
/* figure out if there is a http: or ftp: */
urlcopyorig = urlcopy = (char *) malloc(strlen(url)+1);
strcpy(urlcopy,url);
/* set some defaults */
*port = 80;
strcpy(proto,"http:");
strcpy(host,"localhost");
strcpy(fn,"/");
ptrstr = strstr(urlcopy,"http:");
if (ptrstr == NULL) {
/* Nope, not http: */
ptrstr = strstr(urlcopy,"root:");
if (ptrstr == NULL) {
/* Nope, not root either */
ptrstr = strstr(urlcopy,"ftp:");
if (ptrstr != NULL) {
if (ptrstr == urlcopy) {
strcpy(proto,"ftp:");
*port = 21;
isftp++;
urlcopy += 4; /* move past ftp: */
} else {
/* not at the beginning, bad url */
free(urlcopyorig);
return 1;
}
}
} else {
if (ptrstr == urlcopy) {
urlcopy += 5; /* move past root: */
} else {
/* not at the beginning, bad url */
free(urlcopyorig);
return 1;
}
}
} else {
if (ptrstr == urlcopy) {
urlcopy += 5; /* move past http: */
} else {
free(urlcopyorig);
return 1;
}
}
/* got the protocol */
/* get the hostname */
if (urlcopy[0] == '/' && urlcopy[1] == '/') {
/* we have a hostname */
urlcopy += 2; /* move past the // */
}
/* do this only if http */
if (!strcmp(proto,"http:")) {
/* Move past any user:password */
if ((thost = strchr(urlcopy, '@')) != NULL)
urlcopy = thost+1;
strcpy(host,urlcopy);
thost = host;
while (*urlcopy != '/' && *urlcopy != ':' && *urlcopy) {
thost++;
urlcopy++;
}
/* we should either be at the end of the string, have a /, or have a : */
*thost = '\0';
if (*urlcopy == ':') {
/* follows a port number */
urlcopy++;
sscanf(urlcopy,"%d",port);
while (*urlcopy != '/' && *urlcopy) urlcopy++; /* step to the */
}
} else {
/* do this for ftp */
strcpy(host,urlcopy);
thost = host;
while (*urlcopy != '/' && *urlcopy) {
thost++;
urlcopy++;
}
*thost = '\0';
/* Now, we should either be at the end of the string, or have a / */
}
/* Now the rest is a fn */
if (*urlcopy) {
strcpy(fn,urlcopy);
}
free(urlcopyorig);
return 0;
}
/*--------------------------------------------------------------------------*/
/* Small helper functions to set the netoutfile static string */
/* Called by cfileio after parsing the output file off of the input file url */
int http_checkfile (char *urltype, char *infile, char *outfile1)
{
char newinfile[MAXLEN];
FILE *httpfile;
char contentencoding[MAXLEN];
int contentlength;
/* default to http:// if there is no output file */
strcpy(urltype,"http://");
if (strlen(outfile1)) {
/* there is an output file */
/* don't copy the "file://" prefix, if present. */
if (!strncmp(outfile1, "file://", 7) )
strcpy(netoutfile,outfile1+7);
else
strcpy(netoutfile,outfile1);
if (!strncmp(outfile1, "mem:", 4) ) {
/* copy the file to memory, with READ and WRITE access
In this case, it makes no difference whether the http file
and or the output file are compressed or not. */
strcpy(urltype, "httpmem://"); /* use special driver */
return 0;
}
if (strstr(infile, "?")) {
/* file name contains a '?' so probably a cgi string; don't open it */
strcpy(urltype,"httpfile://");
return 0;
}
if (!http_open_network(infile,&httpfile,contentencoding,&contentlength)) {
fclose(httpfile);
/* It's there, we're happy */
if (strstr(infile,".gz") || (strstr(infile,".Z"))) {
/* It's compressed */
if (strstr(outfile1,".gz") || (strstr(outfile1,".Z"))) {
strcpy(urltype,"httpcompress://");
} else {
strcpy(urltype,"httpfile://");
}
} else {
strcpy(urltype,"httpfile://");
}
return 0;
}
/* Ok, let's try the .gz one */
strcpy(newinfile,infile);
strcat(newinfile,".gz");
if (!http_open_network(newinfile,&httpfile,contentencoding,
&contentlength)) {
fclose(httpfile);
strcpy(infile,newinfile);
/* It's there, we're happy, and, it's compressed */
/* It's compressed */
if (strstr(outfile1,".gz") || (strstr(outfile1,".Z"))) {
strcpy(urltype,"httpcompress://");
} else {
strcpy(urltype,"httpfile://");
}
return 0;
}
/* Ok, let's try the .Z one */
strcpy(newinfile,infile);
strcat(newinfile,".Z");
if (!http_open_network(newinfile,&httpfile,contentencoding,
&contentlength)) {
fclose(httpfile);
strcpy(infile,newinfile);
/* It's there, we're happy, and, it's compressed */
if (strstr(outfile1,".gz") || (strstr(outfile1,".Z"))) {
strcpy(urltype,"httpcompress://");
} else {
strcpy(urltype,"httpfile://");
}
return 0;
}
}
return 0;
}
/*--------------------------------------------------------------------------*/
int ftp_checkfile (char *urltype, char *infile, char *outfile1)
{
char newinfile[MAXLEN];
FILE *ftpfile;
FILE *command;
int sock;
/* default to ftp:// */
strcpy(urltype,"ftp://");
if (strlen(outfile1)) {
/* there is an output file */
/* don't copy the "file://" prefix, if present. */
if (!strncmp(outfile1, "file://", 7) )
strcpy(netoutfile,outfile1+7);
else
strcpy(netoutfile,outfile1);
if (!strncmp(outfile1, "mem:", 4) ) {
/* copy the file to memory, with READ and WRITE access
In this case, it makes no difference whether the ftp file
and or the output file are compressed or not. */
strcpy(urltype, "ftpmem://"); /* use special driver */
return 0;
}
if (!ftp_open_network(infile,&ftpfile,&command,&sock)) {
fclose(ftpfile);
fclose(command);
/* It's there, we're happy */
if (strstr(infile,".gz") || (strstr(infile,".Z"))) {
/* It's compressed */
if (strstr(outfile1,".gz") || (strstr(outfile1,".Z"))) {
strcpy(urltype,"ftpcompress://");
} else {
strcpy(urltype,"ftpfile://");
}
} else {
strcpy(urltype,"ftpfile://");
}
return 0;
}
/* Ok, let's try the .gz one */
strcpy(newinfile,infile);
strcat(newinfile,".gz");
if (!ftp_open_network(newinfile,&ftpfile,&command,&sock)) {
fclose(ftpfile);
fclose(command);
strcpy(infile,newinfile);
/* It's there, we're happy, and, it's compressed */
if (strstr(outfile1,".gz") || (strstr(outfile1,".Z"))) {
strcpy(urltype,"ftpcompress://");
} else {
strcpy(urltype,"ftpfile://");
}
return 0;
}
/* Ok, let's try the .Z one */
strcpy(newinfile,infile);
strcat(newinfile,".Z");
if (!ftp_open_network(newinfile,&ftpfile,&command,&sock)) {
fclose(ftpfile);
fclose(command);
strcpy(infile,newinfile);
if (strstr(outfile1,".gz") || (strstr(outfile1,".Z"))) {
strcpy(urltype,"ftpcompress://");
} else {
strcpy(urltype,"ftpfile://");
}
return 0;
}
}
return 0;
}
/*--------------------------------------------------------------------------*/
/* A small helper function to wait for a particular status on the ftp
connectino */
static int ftp_status(FILE *ftp, char *statusstr)
{
/* read through until we find a string beginning with statusstr */
/* This needs a timeout */
char recbuf[MAXLEN];
int len;
len = strlen(statusstr);
while (1) {
if (!(fgets(recbuf,MAXLEN,ftp))) {
#ifdef DEBUG
puts("error reading response in ftp_status");
#endif
return 1; /* error reading */
}
#ifdef DEBUG
printf("ftp_status, return string was %s\n",recbuf);
#endif
recbuf[len] = '\0'; /* make it short */
if (!strcmp(recbuf,statusstr)) {
return 0; /* we're ok */
}
if (recbuf[0] > '3') {
/* oh well, some sort of error */
return 1;
}
}
}
/*
*----------------------------------------------------------------------
*
* CreateSocketAddress --
*
* This function initializes a sockaddr structure for a host and port.
*
* Results:
* 1 if the host was valid, 0 if the host could not be converted to
* an IP address.
*
* Side effects:
* Fills in the *sockaddrPtr structure.
*
*----------------------------------------------------------------------
*/
static int
CreateSocketAddress(
struct sockaddr_in *sockaddrPtr, /* Socket address */
char *host, /* Host. NULL implies INADDR_ANY */
int port) /* Port number */
{
struct hostent *hostent; /* Host database entry */
struct in_addr addr; /* For 64/32 bit madness */
char localhost[MAXLEN];
strcpy(localhost,host);
memset((void *) sockaddrPtr, '\0', sizeof(struct sockaddr_in));
sockaddrPtr->sin_family = AF_INET;
sockaddrPtr->sin_port = htons((unsigned short) (port & 0xFFFF));
if (host == NULL) {
addr.s_addr = INADDR_ANY;
} else {
addr.s_addr = inet_addr(localhost);
if (addr.s_addr == 0xFFFFFFFF) {
hostent = gethostbyname(localhost);
if (hostent != NULL) {
memcpy((void *) &addr,
(void *) hostent->h_addr_list[0],
(size_t) hostent->h_length);
} else {
#ifdef EHOSTUNREACH
errno = EHOSTUNREACH;
#else
#ifdef ENXIO
errno = ENXIO;
#endif
#endif
return 0; /* error */
}
}
}
/*
* NOTE: On 64 bit machines the assignment below is rumored to not
* do the right thing. Please report errors related to this if you
* observe incorrect behavior on 64 bit machines such as DEC Alphas.
* Should we modify this code to do an explicit memcpy?
*/
sockaddrPtr->sin_addr.s_addr = addr.s_addr;
return 1; /* Success. */
}
/* Signal handler for timeouts */
static void signal_handler(int sig) {
switch (sig) {
case SIGALRM: /* process for alarm */
longjmp(env,sig);
default: {
/* Hmm, shouldn't have happend */
exit(sig);
}
}
}
/**************************************************************/
/* Root driver */
/*--------------------------------------------------------------------------*/
int root_init(void)
{
int ii;
for (ii = 0; ii < NMAXFILES; ii++) /* initialize all empty slots in table */
{
handleTable[ii].sock = 0;
handleTable[ii].currentpos = 0;
}
return(0);
}
/*--------------------------------------------------------------------------*/
int root_setoptions(int options)
{
/* do something with the options argument, to stop compiler warning */
options = 0;
return(options);
}
/*--------------------------------------------------------------------------*/
int root_getoptions(int *options)
{
*options = 0;
return(0);
}
/*--------------------------------------------------------------------------*/
int root_getversion(int *version)
{
*version = 10;
return(0);
}
/*--------------------------------------------------------------------------*/
int root_shutdown(void)
{
return(0);
}
/*--------------------------------------------------------------------------*/
int root_open(char *url, int rwmode, int *handle)
{
int ii, status;
int sock;
*handle = -1;
for (ii = 0; ii < NMAXFILES; ii++) /* find empty slot in table */
{
if (handleTable[ii].sock == 0)
{
*handle = ii;
break;
}
}
if (*handle == -1)
return(TOO_MANY_FILES); /* too many files opened */
/*open the file */
if (rwmode) {
status = root_openfile(url, "update", &sock);
} else {
status = root_openfile(url, "read", &sock);
}
if (status)
return(status);
handleTable[ii].sock = sock;
handleTable[ii].currentpos = 0;
return(0);
}
/*--------------------------------------------------------------------------*/
int root_create(char *filename, int *handle)
{
int ii, status;
int sock;
*handle = -1;
for (ii = 0; ii < NMAXFILES; ii++) /* find empty slot in table */
{
if (handleTable[ii].sock == 0)
{
*handle = ii;
break;
}
}
if (*handle == -1)
return(TOO_MANY_FILES); /* too many files opened */
/*open the file */
status = root_openfile(filename, "create", &sock);
if (status) {
ffpmsg("Unable to create file");
return(status);
}
handleTable[ii].sock = sock;
handleTable[ii].currentpos = 0;
return(0);
}
/*--------------------------------------------------------------------------*/
int root_size(int handle, LONGLONG *filesize)
/*
return the size of the file in bytes
*/
{
int sock;
int offset;
int status;
int op;
sock = handleTable[handle].sock;
status = root_send_buffer(sock,ROOTD_STAT,NULL,0);
status = root_recv_buffer(sock,&op,(char *)&offset, 4);
*filesize = (LONGLONG) ntohl(offset);
return(0);
}
/*--------------------------------------------------------------------------*/
int root_close(int handle)
/*
close the file
*/
{
int status;
int sock;
sock = handleTable[handle].sock;
status = root_send_buffer(sock,ROOTD_CLOSE,NULL,0);
close(sock);
handleTable[handle].sock = 0;
return(0);
}
/*--------------------------------------------------------------------------*/
int root_flush(int handle)
/*
flush the file
*/
{
int status;
int sock;
sock = handleTable[handle].sock;
status = root_send_buffer(sock,ROOTD_FLUSH,NULL,0);
return(0);
}
/*--------------------------------------------------------------------------*/
int root_seek(int handle, LONGLONG offset)
/*
seek to position relative to start of the file
*/
{
handleTable[handle].currentpos = offset;
return(0);
}
/*--------------------------------------------------------------------------*/
int root_read(int hdl, void *buffer, long nbytes)
/*
read bytes from the current position in the file
*/
{
char msg[SHORTLEN];
int op;
int status;
int astat;
/* we presume here that the file position will never be > 2**31 = 2.1GB */
sprintf(msg,"%ld %ld ",(long) handleTable[hdl].currentpos,nbytes);
status = root_send_buffer(handleTable[hdl].sock,ROOTD_GET,msg,strlen(msg));
if ((unsigned) status != strlen(msg)) {
return (READ_ERROR);
}
astat = 0;
status = root_recv_buffer(handleTable[hdl].sock,&op,(char *) &astat,4);
if (astat != 0) {
return (READ_ERROR);
}
#ifdef DEBUG
printf("root_read, op %d astat %d\n",op,astat);
#endif
status = NET_RecvRaw(handleTable[hdl].sock,buffer,nbytes);
if (status != nbytes) {
return (READ_ERROR);
}
handleTable[hdl].currentpos += nbytes;
return(0);
}
/*--------------------------------------------------------------------------*/
int root_write(int hdl, void *buffer, long nbytes)
/*
write bytes at the current position in the file
*/
{
char msg[SHORTLEN];
int len;
int sock;
int status;
int astat;
int op;
sock = handleTable[hdl].sock;
/* we presume here that the file position will never be > 2**31 = 2.1GB */
sprintf(msg,"%ld %ld ",(long) handleTable[hdl].currentpos,nbytes);
len = strlen(msg);
status = root_send_buffer(sock,ROOTD_PUT,msg,len+1);
if (status != len+1) {
return (WRITE_ERROR);
}
status = NET_SendRaw(sock,buffer,nbytes,NET_DEFAULT);
if (status != nbytes) {
return (WRITE_ERROR);
}
astat = 0;
status = root_recv_buffer(handleTable[hdl].sock,&op,(char *) &astat,4);
#ifdef DEBUG
printf("root_read, op %d astat %d\n",op,astat);
#endif
if (astat != 0) {
return (WRITE_ERROR);
}
handleTable[hdl].currentpos += nbytes;
return(0);
}
/*--------------------------------------------------------------------------*/
int root_openfile(char *url, char *rwmode, int *sock)
/*
lowest level routine to physically open a root file
*/
{
int status;
char recbuf[MAXLEN];
char errorstr[MAXLEN];
char proto[SHORTLEN];
char host[SHORTLEN];
char fn[MAXLEN];
char turl[MAXLEN];
int port;
int op;
int ii;
int authstat;
/* Parse the URL apart again */
strcpy(turl,"root://");
strcat(turl,url);
if (NET_ParseUrl(turl,proto,host,&port,fn)) {
sprintf(errorstr,"URL Parse Error (root_open) %s",url);
ffpmsg(errorstr);
return (FILE_NOT_OPENED);
}
#ifdef DEBUG
printf("Connecting to %s on port %d\n",host,port);
#endif
/* Connect to the remote host */
*sock = NET_TcpConnect(host,port);
if (*sock < 0) {
ffpmsg("Couldn't connect to host (http_open_network)");
return (FILE_NOT_OPENED);
}
/* get the username */
if (NULL != getenv("ROOTUSERNAME")) {
strcpy(recbuf,getenv("ROOTUSERNAME"));
} else {
printf("Username: ");
fgets(recbuf,MAXLEN,stdin);
recbuf[strlen(recbuf)-1] = '\0';
}
status = root_send_buffer(*sock, ROOTD_USER, recbuf,strlen(recbuf));
if (status < 0) {
ffpmsg("error talking to remote system on username ");
return (FILE_NOT_OPENED);
}
status = root_recv_buffer(*sock,&op,(char *)&authstat,4);
if (!status) {
ffpmsg("error talking to remote system on username");
return (FILE_NOT_OPENED);
}
#ifdef DEBUG
printf("op is %d and authstat is %d\n",op,authstat);
#endif
if (op != ROOTD_AUTH) {
ffpmsg("ERROR on ROOTD_USER");
ffpmsg(recbuf);
return (FILE_NOT_OPENED);
}
/* now the password */
if (NULL != getenv("ROOTPASSWORD")) {
strcpy(recbuf,getenv("ROOTPASSWORD"));
} else {
printf("Password: ");
fgets(recbuf,MAXLEN,stdin);
recbuf[strlen(recbuf)-1] = '\0';
}
/* ones complement the password */
for (ii=0;(unsigned) ii<strlen(recbuf);ii++) {
recbuf[ii] = ~recbuf[ii];
}
status = root_send_buffer(*sock, ROOTD_PASS, recbuf, strlen(recbuf));
if (status < 0) {
ffpmsg("error talking to remote system sending password");
return (FILE_NOT_OPENED);
}
status = root_recv_buffer(*sock,&op,(char *)&authstat,4);
if (status < 0) {
ffpmsg("error talking to remote system acking password");
return (FILE_NOT_OPENED);
}
#ifdef DEBUG
printf("op is %d and authstat is %d\n",op,authstat);
#endif
if (op != ROOTD_AUTH) {
ffpmsg("ERROR on ROOTD_PASS");
ffpmsg(recbuf);
return (FILE_NOT_OPENED);
}
/* now the file open request */
strcpy(recbuf,fn);
strcat(recbuf," ");
strcat(recbuf,rwmode);
status = root_send_buffer(*sock, ROOTD_OPEN, recbuf, strlen(recbuf));
if (status < 0) {
ffpmsg("error talking to remote system on open ");
return (FILE_NOT_OPENED);
}
status = root_recv_buffer(*sock,&op,(char *)&authstat,4);
if (status < 0) {
ffpmsg("error talking to remote system on open");
return (FILE_NOT_OPENED);
}
#ifdef DEBUG
printf("op is %d and recbuf is %d\n",op,authstat);
#endif
if ((op != ROOTD_OPEN) && (authstat != 0)) {
ffpmsg("ERROR on ROOTD_OPEN");
ffpmsg(recbuf);
return (FILE_NOT_OPENED);
}
return 0;
}
static int root_send_buffer(int sock, int op, char *buffer, int buflen)
{
/* send a buffer, the form is
<len>
<op>
<buffer>
<len> includes the 4 bytes for the op, the length bytes (4) are implicit
if buffer is null don't send it, not everything needs something sent */
int len;
int status;
int hdr[2];
len = 4;
if (buffer != NULL) {
len += buflen;
}
hdr[0] = htonl(len);
#ifdef DEBUG
printf("len sent is %x\n",hdr[0]);
#endif
hdr[1] = htonl(op);
#ifdef DEBUG
printf("op sent is %x\n",hdr[1]);
#endif
#ifdef DEBUG
printf("Sending op %d and length of %d\n",op,len);
#endif
status = NET_SendRaw(sock,hdr,sizeof(hdr),NET_DEFAULT);
if (status < 0) {
return status;
}
if (buffer != NULL) {
status = NET_SendRaw(sock,buffer,buflen,NET_DEFAULT);
}
return status;
}
static int root_recv_buffer(int sock, int *op, char *buffer, int buflen)
{
/* recv a buffer, the form is
<len>
<op>
<buffer>
*/
int recv1 = 0;
int len;
int status;
char recbuf[MAXLEN];
status = NET_RecvRaw(sock,&len,4);
#ifdef DEBUG
printf("Recv: status from rec is %d\n",status);
#endif
if (status < 0) {
return status;
}
recv1 += status;
len = ntohl(len);
#ifdef DEBUG
printf ("Recv: length is %d\n",len);
#endif
/* ok, have the length, recive the operation */
len -= 4;
status = NET_RecvRaw(sock,op,4);
if (status < 0) {
return status;
}
recv1 += status;
*op = ntohl(*op);
#ifdef DEBUG
printf ("Recv: Operation is %d\n",*op);
#endif
if (len > MAXLEN) {
len = MAXLEN;
}
if (len > 0) { /* Get the rest of the message */
status = NET_RecvRaw(sock,recbuf,len);
if (len > buflen) {
len = buflen;
}
memcpy(buffer,recbuf,len);
if (status < 0) {
return status;
}
}
recv1 += status;
return recv1;
}
/*****************************************************************************/
/*
Encode a string into MIME Base64 format string
*/
static int encode64(unsigned s_len, char *src, unsigned d_len, char *dst) {
static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789"
"+/";
unsigned triad;
for (triad = 0; triad < s_len; triad += 3) {
unsigned long int sr;
unsigned byte;
for (byte = 0; (byte<3) && (triad+byte<s_len); ++byte) {
sr <<= 8;
sr |= (*(src+triad+byte) & 0xff);
}
/* shift left to next 6 bit alignment*/
sr <<= (6-((8*byte)%6))%6;
if (d_len < 4)
return 1;
*(dst+0) = *(dst+1) = *(dst+2) = *(dst+3) = '=';
switch(byte) {
case 3:
*(dst+3) = base64[sr&0x3f];
sr >>= 6;
case 2:
*(dst+2) = base64[sr&0x3f];
sr >>= 6;
case 1:
*(dst+1) = base64[sr&0x3f];
sr >>= 6;
*(dst+0) = base64[sr&0x3f];
}
dst += 4;
d_len -= 4;
}
*dst = '\0';
return 0;
}
#endif
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