1/*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at http://curl.haxx.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 ***************************************************************************/ 22 23#include "curl_setup.h" 24 25#ifndef CURL_DISABLE_GOPHER 26 27#include "urldata.h" 28#include <curl/curl.h> 29#include "transfer.h" 30#include "sendf.h" 31 32#include "progress.h" 33#include "strequal.h" 34#include "gopher.h" 35#include "rawstr.h" 36#include "select.h" 37#include "url.h" 38#include "warnless.h" 39 40#define _MPRINTF_REPLACE /* use our functions only */ 41#include <curl/mprintf.h> 42 43#include "curl_memory.h" 44/* The last #include file should be: */ 45#include "memdebug.h" 46 47/* 48 * Forward declarations. 49 */ 50 51static CURLcode gopher_do(struct connectdata *conn, bool *done); 52 53/* 54 * Gopher protocol handler. 55 * This is also a nice simple template to build off for simple 56 * connect-command-download protocols. 57 */ 58 59const struct Curl_handler Curl_handler_gopher = { 60 "GOPHER", /* scheme */ 61 ZERO_NULL, /* setup_connection */ 62 gopher_do, /* do_it */ 63 ZERO_NULL, /* done */ 64 ZERO_NULL, /* do_more */ 65 ZERO_NULL, /* connect_it */ 66 ZERO_NULL, /* connecting */ 67 ZERO_NULL, /* doing */ 68 ZERO_NULL, /* proto_getsock */ 69 ZERO_NULL, /* doing_getsock */ 70 ZERO_NULL, /* domore_getsock */ 71 ZERO_NULL, /* perform_getsock */ 72 ZERO_NULL, /* disconnect */ 73 ZERO_NULL, /* readwrite */ 74 PORT_GOPHER, /* defport */ 75 CURLPROTO_GOPHER, /* protocol */ 76 PROTOPT_NONE /* flags */ 77}; 78 79static CURLcode gopher_do(struct connectdata *conn, bool *done) 80{ 81 CURLcode result=CURLE_OK; 82 struct SessionHandle *data=conn->data; 83 curl_socket_t sockfd = conn->sock[FIRSTSOCKET]; 84 85 curl_off_t *bytecount = &data->req.bytecount; 86 char *path = data->state.path; 87 char *sel; 88 char *sel_org = NULL; 89 ssize_t amount, k; 90 91 *done = TRUE; /* unconditionally */ 92 93 /* Create selector. Degenerate cases: / and /1 => convert to "" */ 94 if(strlen(path) <= 2) 95 sel = (char *)""; 96 else { 97 char *newp; 98 size_t j, i; 99 int len; 100 101 /* Otherwise, drop / and the first character (i.e., item type) ... */ 102 newp = path; 103 newp+=2; 104 105 /* ... then turn ? into TAB for search servers, Veronica, etc. ... */ 106 j = strlen(newp); 107 for(i=0; i<j; i++) 108 if(newp[i] == '?') 109 newp[i] = '\x09'; 110 111 /* ... and finally unescape */ 112 sel = curl_easy_unescape(data, newp, 0, &len); 113 if(!sel) 114 return CURLE_OUT_OF_MEMORY; 115 sel_org = sel; 116 } 117 118 /* We use Curl_write instead of Curl_sendf to make sure the entire buffer is 119 sent, which could be sizeable with long selectors. */ 120 k = curlx_uztosz(strlen(sel)); 121 122 for(;;) { 123 result = Curl_write(conn, sockfd, sel, k, &amount); 124 if(CURLE_OK == result) { /* Which may not have written it all! */ 125 result = Curl_client_write(conn, CLIENTWRITE_HEADER, sel, amount); 126 if(result) { 127 Curl_safefree(sel_org); 128 return result; 129 } 130 k -= amount; 131 sel += amount; 132 if(k < 1) 133 break; /* but it did write it all */ 134 } 135 else { 136 failf(data, "Failed sending Gopher request"); 137 Curl_safefree(sel_org); 138 return result; 139 } 140 /* Don't busyloop. The entire loop thing is a work-around as it causes a 141 BLOCKING behavior which is a NO-NO. This function should rather be 142 split up in a do and a doing piece where the pieces that aren't 143 possible to send now will be sent in the doing function repeatedly 144 until the entire request is sent. 145 146 Wait a while for the socket to be writable. Note that this doesn't 147 acknowledge the timeout. 148 */ 149 Curl_socket_ready(CURL_SOCKET_BAD, sockfd, 100); 150 } 151 152 Curl_safefree(sel_org); 153 154 /* We can use Curl_sendf to send the terminal \r\n relatively safely and 155 save allocing another string/doing another _write loop. */ 156 result = Curl_sendf(sockfd, conn, "\r\n"); 157 if(result != CURLE_OK) { 158 failf(data, "Failed sending Gopher request"); 159 return result; 160 } 161 result = Curl_client_write(conn, CLIENTWRITE_HEADER, (char *)"\r\n", 2); 162 if(result) 163 return result; 164 165 Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, bytecount, 166 -1, NULL); /* no upload */ 167 return CURLE_OK; 168} 169#endif /*CURL_DISABLE_GOPHER*/ 170