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Annotation of embedaddon/curl/docs/examples/ftp-wildcard.c, revision 1.1

1.1     ! misho       1: /***************************************************************************
        !             2:  *                                  _   _ ____  _
        !             3:  *  Project                     ___| | | |  _ \| |
        !             4:  *                             / __| | | | |_) | |
        !             5:  *                            | (__| |_| |  _ <| |___
        !             6:  *                             \___|\___/|_| \_\_____|
        !             7:  *
        !             8:  * Copyright (C) 1998 - 2019, 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 https://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: /* <DESC>
        !            23:  * FTP wildcard pattern matching
        !            24:  * </DESC>
        !            25:  */
        !            26: #include <curl/curl.h>
        !            27: #include <stdio.h>
        !            28: 
        !            29: struct callback_data {
        !            30:   FILE *output;
        !            31: };
        !            32: 
        !            33: static long file_is_coming(struct curl_fileinfo *finfo,
        !            34:                            struct callback_data *data,
        !            35:                            int remains);
        !            36: 
        !            37: static long file_is_downloaded(struct callback_data *data);
        !            38: 
        !            39: static size_t write_it(char *buff, size_t size, size_t nmemb,
        !            40:                        void *cb_data);
        !            41: 
        !            42: int main(int argc, char **argv)
        !            43: {
        !            44:   /* curl easy handle */
        !            45:   CURL *handle;
        !            46: 
        !            47:   /* help data */
        !            48:   struct callback_data data = { 0 };
        !            49: 
        !            50:   /* global initialization */
        !            51:   int rc = curl_global_init(CURL_GLOBAL_ALL);
        !            52:   if(rc)
        !            53:     return rc;
        !            54: 
        !            55:   /* initialization of easy handle */
        !            56:   handle = curl_easy_init();
        !            57:   if(!handle) {
        !            58:     curl_global_cleanup();
        !            59:     return CURLE_OUT_OF_MEMORY;
        !            60:   }
        !            61: 
        !            62:   /* turn on wildcard matching */
        !            63:   curl_easy_setopt(handle, CURLOPT_WILDCARDMATCH, 1L);
        !            64: 
        !            65:   /* callback is called before download of concrete file started */
        !            66:   curl_easy_setopt(handle, CURLOPT_CHUNK_BGN_FUNCTION, file_is_coming);
        !            67: 
        !            68:   /* callback is called after data from the file have been transferred */
        !            69:   curl_easy_setopt(handle, CURLOPT_CHUNK_END_FUNCTION, file_is_downloaded);
        !            70: 
        !            71:   /* this callback will write contents into files */
        !            72:   curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, write_it);
        !            73: 
        !            74:   /* put transfer data into callbacks */
        !            75:   curl_easy_setopt(handle, CURLOPT_CHUNK_DATA, &data);
        !            76:   curl_easy_setopt(handle, CURLOPT_WRITEDATA, &data);
        !            77: 
        !            78:   /* curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L); */
        !            79: 
        !            80:   /* set an URL containing wildcard pattern (only in the last part) */
        !            81:   if(argc == 2)
        !            82:     curl_easy_setopt(handle, CURLOPT_URL, argv[1]);
        !            83:   else
        !            84:     curl_easy_setopt(handle, CURLOPT_URL, "ftp://example.com/test/*");
        !            85: 
        !            86:   /* and start transfer! */
        !            87:   rc = curl_easy_perform(handle);
        !            88: 
        !            89:   curl_easy_cleanup(handle);
        !            90:   curl_global_cleanup();
        !            91:   return rc;
        !            92: }
        !            93: 
        !            94: static long file_is_coming(struct curl_fileinfo *finfo,
        !            95:                            struct callback_data *data,
        !            96:                            int remains)
        !            97: {
        !            98:   printf("%3d %40s %10luB ", remains, finfo->filename,
        !            99:          (unsigned long)finfo->size);
        !           100: 
        !           101:   switch(finfo->filetype) {
        !           102:   case CURLFILETYPE_DIRECTORY:
        !           103:     printf(" DIR\n");
        !           104:     break;
        !           105:   case CURLFILETYPE_FILE:
        !           106:     printf("FILE ");
        !           107:     break;
        !           108:   default:
        !           109:     printf("OTHER\n");
        !           110:     break;
        !           111:   }
        !           112: 
        !           113:   if(finfo->filetype == CURLFILETYPE_FILE) {
        !           114:     /* do not transfer files >= 50B */
        !           115:     if(finfo->size > 50) {
        !           116:       printf("SKIPPED\n");
        !           117:       return CURL_CHUNK_BGN_FUNC_SKIP;
        !           118:     }
        !           119: 
        !           120:     data->output = fopen(finfo->filename, "wb");
        !           121:     if(!data->output) {
        !           122:       return CURL_CHUNK_BGN_FUNC_FAIL;
        !           123:     }
        !           124:   }
        !           125: 
        !           126:   return CURL_CHUNK_BGN_FUNC_OK;
        !           127: }
        !           128: 
        !           129: static long file_is_downloaded(struct callback_data *data)
        !           130: {
        !           131:   if(data->output) {
        !           132:     printf("DOWNLOADED\n");
        !           133:     fclose(data->output);
        !           134:     data->output = 0x0;
        !           135:   }
        !           136:   return CURL_CHUNK_END_FUNC_OK;
        !           137: }
        !           138: 
        !           139: static size_t write_it(char *buff, size_t size, size_t nmemb,
        !           140:                        void *cb_data)
        !           141: {
        !           142:   struct callback_data *data = cb_data;
        !           143:   size_t written = 0;
        !           144:   if(data->output)
        !           145:     written = fwrite(buff, size, nmemb, data->output);
        !           146:   else
        !           147:     /* listing output */
        !           148:     written = fwrite(buff, size, nmemb, stdout);
        !           149:   return written;
        !           150: }