Gopher protocol support (initial release)

1 files changed, 162 insertions, 0 deletions

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*/