gopher/gopher.c

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#pragma optimize 79
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#include <Locator.h>
#include <Memory.h>
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#include <MiscTool.h>
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#include <tcpip.h>
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#include "url.h"
#include "connection.h"
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#include "readline2.h"
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#include <stdio.h>
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#include <string.h>
#include <stdlib.h>
#include <errno.h>
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#include <unistd.h>
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/*
* connect gopher.floodgap.com:70
* send path
* read output.
* text -- ends with . <CR><LF>
* bin -- ends when connection is closed.
*/
// startup/shutdown flags.
enum {
kLoaded = 1,
kStarted = 2,
kConnected = 4
};
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Word StartUp(displayPtr fx)
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{
word status;
word flags = 0;
// TCPIP is an init, not a tool, so it should always
// be loaded.
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status = TCPIPStatus();
if (_toolErr)
{
LoadOneTool(54, 0x0300);
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if (_toolErr) return -1;
status = 0;
flags |= kLoaded;
}
#if 0
// require 3.0b3
if (TCPIPLongVersion() < 0x03006003)
{
if (flags & kLoaded)
UnloadOneTool(54);
return -1;
}
#endif
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if (!status)
{
TCPIPStartUp();
if (_toolErr) return -1;
flags |= kStarted;
}
status = TCPIPGetConnectStatus();
if (!status)
{
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TCPIPConnect(fx);
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flags |= kConnected;
}
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return flags;
}
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void ShutDown(word flags, Boolean force, displayPtr fx)
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{
if (flags & kConnected)
{
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TCPIPDisconnect(force, fx);
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if (_toolErr) return;
}
if (flags & kStarted)
{
TCPIPShutDown();
if (_toolErr) return;
}
if (flags & kLoaded)
{
UnloadOneTool(54);
}
}
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int gopher_binary(Word ipid, FILE *file)
{
// gopher binary support.
// format: raw data until eof.
Word rv = 0;
for(;;)
{
static char buffer[512];
rrBuff rb;
Word count;
TCPIPPoll();
rv = TCPIPReadTCP(ipid, 0, (Ref)buffer, 512, &rb);
count = rb.rrBuffCount;
if (rv == 0 && count == 0) continue;
if (rv && !count) break;
if (!count) continue;
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fwrite(buffer, 1, count, file);
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}
return rv;
}
int gopher_text(Word ipid, FILE *file)
{
// text \r\n
// ...
// . \r\n
// any leading '.' must be doubled.
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Word eof = 0;
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int rv = 0;
Word lastTerm = 0;
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TCPIPPoll();
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for(;;)
{
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Word count;
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Handle h;
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rlBuffer rb;
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rv = ReadLine2(ipid, &rb);
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h = rb.bufferHandle;
count = rb.bufferSize;
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if (rv < 0) break; // eof
if (rv == 0) // no data available (yet)
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{
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TCPIPPoll();
continue;
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}
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if (!rb.moreFlag) TCPIPPoll();
if (count == 0)
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{
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DisposeHandle(h);
if (rb.terminator)
{
if (lastTerm == '\r' && rb.terminator == '\n')
{
/* nothing */
}
else
fputc('\r', file);
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}
lastTerm = rb.terminator;
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continue;
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}
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if (count)
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{
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char *cp;
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HLock(h);
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cp = *((char **)h);
// .. -> .
// . \r\n -> eof
if (*cp == '.')
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{
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if (count == 1)
{
DisposeHandle(h);
eof = 1;
break;
}
cp++;
count--;
}
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fwrite(cp, 1, count, file);
fputc('\r', file);
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}
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DisposeHandle(h);
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}
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if (!eof)
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fprintf(stderr, "Warning: eof not found.\n");
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return eof ? 0 : -1;
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}
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int gopher_dir(Word ipid, FILE *file)
{
Word eof = 0;
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int rv = 0;
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TCPIPPoll();
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// blank lines are ignored, so no need to check for terminator split.
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for(;;)
{
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rlBuffer rb;
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Word count;
Handle h;
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rv = ReadLine2(ipid, &rb);
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h = rb.bufferHandle;
count = rb.bufferSize;
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if (rv < 0) break;
if (rv == 0)
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{
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TCPIPPoll();
continue;
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}
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if (!rb.moreFlag) TCPIPPoll();
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if (!count)
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{
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// blank line?
continue;
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}
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if (count)
{
Word tabs[4];
unsigned i,j;
char type;
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char *buffer;
HLock(h);
buffer = *((char **)h);
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type = *buffer;
++buffer;
--count;
if (type == '.' && count == 0)
{
eof = 1;
DisposeHandle(h);
break;
}
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// format is [type][name] \t [path] \t [server] \t [port]
j = 1;
tabs[0] = 0;
tabs[1] = tabs[2] = tabs[3] = -1;
for (i = 0; i < count; ++i)
{
if (buffer[i] == '\t')
{
tabs[j++] = i;
buffer[i] = 0;
if (j == 4) break;
}
}
// 'i' is info record.
if (type == 'i')
{
if (tabs[1] == -1)
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fwrite(buffer, 1, count, file);
else
fputs(buffer, file);
fputc('\r', file);
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}
else if (j == 4) // all the tabs.
{
int port = 0;
// description
// file name
// server
// port
for (i = tabs[3] + 1; i < count; ++i)
{
char c = buffer[i];
if (c >= '0' && c <= '9') port = port * 10 + c - '0';
}
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if (port == 70)
{
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fprintf(file, "[%s/%c%s] %s\r",
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buffer + 1 + tabs[2], // server
type, // type
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buffer + 1 + tabs[1], // file name
buffer // description
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);
}
else
{
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fprintf(file, "[%s:%u/%c%s] %s\r",
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buffer + 1 + tabs[2], // server
port, // port
type, // type
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buffer + 1 + tabs[1], // file name
buffer // description
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);
}
}
DisposeHandle(h);
}
}
if (!eof)
fprintf(stderr, "Warning: eof not found.\n");
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return eof ? 0 : -1;
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}
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void do_gopher(const char *url, URLComponents *components, FILE *file)
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{
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Connection buffer;
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char *host;
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char type;
LongWord qtick;
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if (!components->portNumber) components->portNumber = 70;
host = malloc(components->host.length + 1);
URLComponentGetC(url, components, URLComponentHost, host);
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ConnectionInit(&buffer, MMStartUp());
ConnectionOpenC(&buffer, host, components->portNumber);
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// 30 second timeout.
qtick = GetTick() + 30 * 60;
while (!ConnectionPoll(&buffer))
{
if (GetTick() >= qtick)
{
fprintf(stderr, "Connection timed out.\n");
// todo -- still need to close it...
free(host);
return;
}
}
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if (buffer.state == kConnectionStateError)
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{
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fprintf(stderr, "Unable to open host: %s:%u\n",
host,
components->portNumber);
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free(host);
return;
}
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// connected....
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// path is /[type][resource]
// where [type] is 1 char and the leading / is ignored.
if (components->path.length <= 1)
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{
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// / or blank
type = '1'; // directory
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}
else if (components->path.length == 2)
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{
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// / type
// invalid -- treat as /
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type = '1';
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}
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else
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{
type = url[components->path.location+1];
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TCPIPWriteTCP(
buffer.ipid,
url + components->path.location + 2,
components->path.length - 2,
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0,
0);
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}
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//
TCPIPWriteTCP(buffer.ipid, "\r\n", 2, true, 0);
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// 5 and 9 are binary, 1 is dir, all others text.
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switch(type)
{
case '1':
gopher_dir(buffer.ipid, file);
break;
case '5':
case '9':
fsetbinary(file);
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gopher_binary(buffer.ipid, file);
break;
default:
gopher_text(buffer.ipid, file);
break;
}
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fflush(file);
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ConnectionClose(&buffer);
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while (!ConnectionPoll(&buffer)) ; // wait for it to close.
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free (host);
}
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void help(void)
{
fputs("gopher [options] url\n", stdout);
fputs("-h display help information.\n", stdout);
fputs("-v display version information.\n", stdout);
fputs("-O write output to file.\n", stdout);
fputs("-o <file> write output to <file> instead of stdout.\n", stdout);
fputs("\n", stdout);
exit(0);
}
/*
*
*
*/
char *get_url_filename(const char *cp, URLComponents *components)
{
URLRange path;
int slash;
int i, j;
char *out;
path = components->path;
if (path.length <= 0) return NULL;
cp += path.location;
// scan the path, for the last '/'
slash = -1;
for (i = 0; i < path.length; ++i)
{
if (cp[i] == '/') slash = i;
}
if (slash == -1 || slash + 1 >= path.length) return NULL;
out = (char *)malloc(path.length - slash);
if (!out) return NULL;
j = 0;
i = slash + 1; // skip the slash.
while (i < path.length)
out[j++] = cp[i++];
out[j] = 0; // null terminate.
return out;
}
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int main(int argc, char **argv)
{
int i;
Word flags;
int ch;
char *filename = NULL;
int flagO = 0;
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flags = StartUp(NULL);
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while ((ch = getopt(argc, argv, "o:Oh")) != -1)
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{
switch (ch)
{
case 'v':
fputs("gopher v 0.1\n", stdout);
exit(0);
break;
case 'o':
filename = optarg;
break;
case 'O':
flagO = 1;
break;
case 'h':
case '?':
case ':':
default:
help();
break;
}
}
argc -= optind;
argv += optind;
if (argc != 1)
{
help();
}
if (argc == 1)
{
const char *url;
URLComponents components;
url = *argv;
if (!ParseURL(url, strlen(url), &components))
{
fprintf(stderr, "Invalid URL: %s\n", url);
exit(1);
}
if (!components.host.length)
{
fprintf(stderr, "No host.\n");
exit(1);
}
if (components.schemeType == SCHEME_GOPHER)
{
FILE *file = NULL;
if (!components.portNumber) components.portNumber = 70;
if (filename)
{
file = fopen(filename, "w");
if (!file)
{
fprintf(stderr, "Unable to open file ``%s'': %s",
filename, strerror(errno));
exit(1);
}
}
else if (flagO)
{
// get the file name from the URL.
filename = get_url_filename(url, &components);
if (!filename)
{
fprintf(stderr, "-O flag cannot be used with this URL.\n");
exit(1);
}
file = fopen(filename, "w");
if (!file)
{
fprintf(stderr, "Unable to open file ``%s'': %s",
filename, strerror(errno));
exit(1);
}
free(filename);
filename = NULL;
}
else file = stdout;
do_gopher(url, &components, file);
if (file != stdout) fclose(file);
}
else
{
fprintf(stderr, "Unsupported scheme.\n");
exit(1);
}
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}
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ShutDown(flags, false, NULL);
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return 0;
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}