quickjs-tart

quickjs-based runtime for wallet-core logic
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debug.c (4329B)

      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 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.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  * SPDX-License-Identifier: curl
     22  *
     23  ***************************************************************************/
     24 /* <DESC>
     25  * Show how CURLOPT_DEBUGFUNCTION can be used.
     26  * </DESC>
     27  */
     28 #include <stdio.h>
     29 #include <curl/curl.h>
     30 
     31 struct data {
     32   char trace_ascii; /* 1 or 0 */
     33 };
     34 
     35 static
     36 void dump(const char *text,
     37           FILE *stream, unsigned char *ptr, size_t size,
     38           char nohex)
     39 {
     40   size_t i;
     41   size_t c;
     42 
     43   unsigned int width = 0x10;
     44 
     45   if(nohex)
     46     /* without the hex output, we can fit more on screen */
     47     width = 0x40;
     48 
     49   fprintf(stream, "%s, %10.10lu bytes (0x%8.8lx)\n",
     50           text, (unsigned long)size, (unsigned long)size);
     51 
     52   for(i = 0; i < size; i += width) {
     53 
     54     fprintf(stream, "%4.4lx: ", (unsigned long)i);
     55 
     56     if(!nohex) {
     57       /* hex not disabled, show it */
     58       for(c = 0; c < width; c++)
     59         if(i + c < size)
     60           fprintf(stream, "%02x ", ptr[i + c]);
     61         else
     62           fputs("   ", stream);
     63     }
     64 
     65     for(c = 0; (c < width) && (i + c < size); c++) {
     66       /* check for 0D0A; if found, skip past and start a new line of output */
     67       if(nohex && (i + c + 1 < size) && ptr[i + c] == 0x0D &&
     68          ptr[i + c + 1] == 0x0A) {
     69         i += (c + 2 - width);
     70         break;
     71       }
     72       fprintf(stream, "%c",
     73               (ptr[i + c] >= 0x20) && (ptr[i + c] < 0x80) ? ptr[i + c] : '.');
     74       /* check again for 0D0A, to avoid an extra \n if it's at width */
     75       if(nohex && (i + c + 2 < size) && ptr[i + c + 1] == 0x0D &&
     76          ptr[i + c + 2] == 0x0A) {
     77         i += (c + 3 - width);
     78         break;
     79       }
     80     }
     81     fputc('\n', stream); /* newline */
     82   }
     83   fflush(stream);
     84 }
     85 
     86 static
     87 int my_trace(CURL *handle, curl_infotype type,
     88              char *data, size_t size,
     89              void *userp)
     90 {
     91   struct data *config = (struct data *)userp;
     92   const char *text;
     93   (void)handle; /* prevent compiler warning */
     94 
     95   switch(type) {
     96   case CURLINFO_TEXT:
     97     fprintf(stderr, "== Info: %s", data);
     98     return 0;
     99   case CURLINFO_HEADER_OUT:
    100     text = "=> Send header";
    101     break;
    102   case CURLINFO_DATA_OUT:
    103     text = "=> Send data";
    104     break;
    105   case CURLINFO_SSL_DATA_OUT:
    106     text = "=> Send SSL data";
    107     break;
    108   case CURLINFO_HEADER_IN:
    109     text = "<= Recv header";
    110     break;
    111   case CURLINFO_DATA_IN:
    112     text = "<= Recv data";
    113     break;
    114   case CURLINFO_SSL_DATA_IN:
    115     text = "<= Recv SSL data";
    116     break;
    117   default: /* in case a new one is introduced to shock us */
    118     return 0;
    119   }
    120 
    121   dump(text, stderr, (unsigned char *)data, size, config->trace_ascii);
    122   return 0;
    123 }
    124 
    125 int main(void)
    126 {
    127   CURL *curl;
    128   CURLcode res;
    129   struct data config;
    130 
    131   config.trace_ascii = 1; /* enable ASCII tracing */
    132 
    133   curl = curl_easy_init();
    134   if(curl) {
    135     curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, my_trace);
    136     curl_easy_setopt(curl, CURLOPT_DEBUGDATA, &config);
    137 
    138     /* the DEBUGFUNCTION has no effect until we enable VERBOSE */
    139     curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
    140 
    141     /* example.com is redirected, so we tell libcurl to follow redirection */
    142     curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
    143 
    144     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    145     res = curl_easy_perform(curl);
    146     /* Check for errors */
    147     if(res != CURLE_OK)
    148       fprintf(stderr, "curl_easy_perform() failed: %s\n",
    149               curl_easy_strerror(res));
    150 
    151     /* always cleanup */
    152     curl_easy_cleanup(curl);
    153   }
    154   return 0;
    155 }