Gopher protocol support (initial release)

9 files changed, 231 insertions, 4 deletions

diff --git a/configure.ac b/configure.ac
index a389cfd85..76c151efd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -570,6 +570,22 @@ AC_HELP_STRING([--disable-smtp],[Disable SMTP support]),
        AC_MSG_RESULT(yes)
 )
 
+AC_MSG_CHECKING([whether to support gopher])
+AC_ARG_ENABLE(gopher,
+AC_HELP_STRING([--enable-gopher],[Enable Gopher support])
+AC_HELP_STRING([--disable-gopher],[Disable Gopher support]),
+[ case "$enableval" in
+  no)
+       AC_MSG_RESULT(no)
+       AC_DEFINE(CURL_DISABLE_GOPHER, 1, [to disable Gopher])
+       AC_SUBST(CURL_DISABLE_GOPHER, [1])
+       ;;
+  *)   AC_MSG_RESULT(yes)
+       ;;
+  esac ],
+       AC_MSG_RESULT(yes)
+)
+
 
 dnl **********************************************************************
 dnl Check for built-in manual
@@ -2738,6 +2754,9 @@ fi
 if test "x$CURL_DISABLE_TFTP" != "x1"; then
   SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS TFTP"
 fi
+if test "x$CURL_DISABLE_GOPHER" != "x1"; then
+  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS GOPHER"
+fi
 if test "x$CURL_DISABLE_POP3" != "x1"; then
   SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS POP3"
   if test "x$SSL_ENABLED" = "x1"; then
diff --git a/include/curl/curl.h b/include/curl/curl.h
index b19828f58..cb9d0fbfb 100644
--- a/include/curl/curl.h
+++ b/include/curl/curl.h
@@ -722,6 +722,7 @@ typedef enum {
 #define CURLPROTO_RTMPTE (1<<22)
 #define CURLPROTO_RTMPS  (1<<23)
 #define CURLPROTO_RTMPTS (1<<24)
+#define CURLPROTO_GOPHER (1<<25)
 #define CURLPROTO_ALL    (~0) /* enable everything */
 
 /* long may be 32 or 64 bits, but we should never depend on anything else
diff --git a/lib/Makefile.inc b/lib/Makefile.inc
index bfd3abedc..33b576520 100644
--- a/lib/Makefile.inc
+++ b/lib/Makefile.inc
@@ -20,7 +20,8 @@ CSOURCES = file.c timeval.c base64.c hostip.c progress.c formdata.c	\
   strdup.c socks.c ssh.c nss.c qssl.c rawstr.c curl_addrinfo.c		\
   socks_gssapi.c socks_sspi.c curl_sspi.c slist.c nonblock.c		\
   curl_memrchr.c imap.c pop3.c smtp.c pingpong.c rtsp.c curl_threads.c	\
-  warnless.c hmac.c polarssl.c curl_rtmp.c openldap.c curl_gethostname.c
+  warnless.c hmac.c polarssl.c curl_rtmp.c openldap.c curl_gethostname.c\
+  gopher.c
 
 HHEADERS = arpa_telnet.h netrc.h file.h timeval.h qssl.h hostip.h	\
   progress.h formdata.h cookie.h http.h sendf.h ftp.h url.h dict.h	\
diff --git a/lib/gopher.c b/lib/gopher.c
new file mode 100644
index 000000000..d1ca440e5
--- /dev/null
+++ b/lib/gopher.c
@@ -0,0 +1,162 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2010, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "setup.h"
+
+#ifndef CURL_DISABLE_GOPHER
+
+/* -- WIN32 approved -- */
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#ifdef WIN32
+#include <time.h>
+#include <io.h>
+#else
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#include <netinet/in.h>
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <netdb.h>
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
+
+#endif
+
+#include "urldata.h"
+#include <curl/curl.h>
+#include "transfer.h"
+#include "sendf.h"
+
+#include "progress.h"
+#include "strequal.h"
+#include "gopher.h"
+#include "rawstr.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+/* The last #include file should be: */
+#include "memdebug.h"
+
+
+/*
+ * Forward declarations.
+ */
+
+static CURLcode gopher_do(struct connectdata *conn, bool *done);
+
+/*
+ * Gopher protocol handler.
+ * This is also a nice simple template to build off for simple
+ * connect-command-download protocols.
+ */
+
+const struct Curl_handler Curl_handler_gopher = {
+  "GOPHER",                             /* scheme */
+  ZERO_NULL,                            /* setup_connection */
+  gopher_do,                            /* do_it */
+  ZERO_NULL,                            /* done */
+  ZERO_NULL,                            /* do_more */
+  ZERO_NULL,                            /* connect_it */
+  ZERO_NULL,                            /* connecting */
+  ZERO_NULL,                            /* doing */
+  ZERO_NULL,                            /* proto_getsock */
+  ZERO_NULL,                            /* doing_getsock */
+  ZERO_NULL,                            /* perform_getsock */
+  ZERO_NULL,                            /* disconnect */
+  PORT_GOPHER,                          /* defport */
+  PROT_GOPHER                           /* protocol */
+};
+
+static CURLcode gopher_do(struct connectdata *conn, bool *done)
+{
+  CURLcode result=CURLE_OK;
+  struct SessionHandle *data=conn->data;
+  curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
+
+  curl_off_t *bytecount = &data->req.bytecount;
+  char *path = data->state.path;
+
+  char *sel;
+
+  *done = TRUE; /* unconditionally */
+
+  /* Create selector. Degenerate cases: / and /1 => convert to "" */
+  if (strlen(path) <= 2)
+    sel = (char *)"";
+  else {
+    char *newp;
+    int i, j, len;
+
+    /* Otherwise, drop / and the first character (i.e., item type) ... */
+    newp = path;
+    newp+=2;
+
+    /* ... then turn ? into TAB for search servers, Veronica, etc. ... */
+    j = strlen(newp);
+    if (j)
+      for(i=0; i<j; i++)
+        newp[i] = ((newp[i] == '?') ? '\x09' : newp[i]);
+
+    /* ... and finally unescape */
+    sel = curl_easy_unescape(data, newp, 0, &len);
+    if (!sel)
+      return CURLE_OUT_OF_MEMORY;
+  }
+
+  result = Curl_sendf(sockfd, conn, "%s\r\n", sel);
+
+  if(result) {
+    failf(data, "Failed sending Gopher request");
+    return result;
+  }
+  Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, bytecount,
+                      -1, NULL); /* no upload */
+  return CURLE_OK;
+}
+#endif /*CURL_DISABLE_GOPHER*/
diff --git a/lib/gopher.h b/lib/gopher.h
new file mode 100644
index 000000000..38bbc4b73
--- /dev/null
+++ b/lib/gopher.h
@@ -0,0 +1,29 @@
+#ifndef HEADER_CURL_GOPHER_H
+#define HEADER_CURL_GOPHER_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2009, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#ifndef CURL_DISABLE_GOPHER
+extern const struct Curl_handler Curl_handler_gopher;
+#endif
+
+#endif /* HEADER_CURL_GOPHER_H */
diff --git a/lib/url.c b/lib/url.c
index 3ae797532..6b312eb11 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -138,6 +138,7 @@ void idn_free (void *ptr); /* prototype from idn-free.h, not provided by
 #include "socks.h"
 #include "rtsp.h"
 #include "curl_rtmp.h"
+#include "gopher.h"
 
 #define _MPRINTF_REPLACE /* use our functions only */
 #include <curl/mprintf.h>
@@ -227,6 +228,10 @@ static const struct Curl_handler * const protocols[] = {
   &Curl_handler_rtsp,
 #endif
 
+#ifndef CURL_DISABLE_GOPHER
+  &Curl_handler_gopher,
+#endif
+
 #ifdef USE_LIBRTMP
   &Curl_handler_rtmp,
   &Curl_handler_rtmpt,
@@ -3482,8 +3487,11 @@ static CURLcode findprotocol(struct SessionHandle *data,
     if(Curl_raw_equal(p->scheme, protostr)) {
       /* Protocol found in table. Check if allowed */
       if(!(data->set.allowed_protocols & p->protocol))
+{
         /* nope, get out */
+	fprintf(stderr, "well, shit\n");
         break;
+}
 
       /* it is allowed for "normal" request, now do an extra check if this is
          the result of a redirect */
diff --git a/lib/urldata.h b/lib/urldata.h
index 940cb3551..9369dd853 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -46,6 +46,7 @@
 #define PORT_RTMP 1935
 #define PORT_RTMPT PORT_HTTP
 #define PORT_RTMPS PORT_HTTPS
+#define PORT_GOPHER 70
 
 #define DICT_MATCH "/MATCH:"
 #define DICT_MATCH2 "/M:"
@@ -712,11 +713,13 @@ struct connectdata {
 #define PROT_RTMPTE  CURLPROTO_RTMPTE
 #define PROT_RTMPS   CURLPROTO_RTMPS
 #define PROT_RTMPTS  CURLPROTO_RTMPTS
+#define PROT_GOPHER  CURLPROTO_GOPHER
 
-/* (1<<24) is currently the highest used bit in the public bitmask. We make
-   sure we use "private bits" above the public ones to make things easier. */
+/* (1<<25) is currently the highest used bit in the public bitmask. We make
+   sure we use "private bits" above the public ones to make things easier;
+   Gopher will not conflict with the current bit 25. */
 
-#define PROT_EXTMASK 0xffffff
+#define PROT_EXTMASK 0x03ffffff
 
 #define PROT_SSL     (1<<29) /* protocol requires SSL */
 
diff --git a/lib/version.c b/lib/version.c
index 9a336a32d..9ba2e33c1 100644
--- a/lib/version.c
+++ b/lib/version.c
@@ -158,6 +158,9 @@ static const char * const protocols[] = {
 #if defined(USE_SSL) && !defined(CURL_DISABLE_FTP)
   "ftps",
 #endif
+#ifndef CURL_DISABLE_GOPHER
+  "gopher",
+#endif
 #ifndef CURL_DISABLE_HTTP
   "http",
 #endif
diff --git a/src/main.c b/src/main.c
index 3734c94fd..d428a7850 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1552,6 +1552,7 @@ static long proto2num(struct Configurable *config, long *val, const char *str)
     { "smtp", CURLPROTO_SMTP },
     { "smtps", CURLPROTO_SMTPS },
     { "rtsp", CURLPROTO_RTSP },
+    { "gopher", CURLPROTO_GOPHER },
     { NULL, 0 }
   };