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📄 10-at-a-time.c(4.24 KB)
📄 Makefile.example(1.86 KB)
📄 README.md(1.35 KB)
📄 altsvc.c(1.83 KB)
📄 anyauthput.c(4.82 KB)
📄 cacertinmem.c(7.14 KB)
📄 certinfo.c(2.25 KB)
📄 chkspeed.c(6.54 KB)
📄 cookie_interface.c(4.03 KB)
📄 crawler.c(6.53 KB)
📄 curlgtk.c(2.94 KB)
📄 curlx.c(16.41 KB)
📄 debug.c(4.21 KB)
📄 ephiperfifo.c(14.49 KB)
📄 evhiperfifo.c(11.9 KB)
📄 externalsocket.c(4.83 KB)
📄 fileupload.c(2.78 KB)
📄 fopen.c(13.87 KB)
📄 ftp-wildcard.c(4.15 KB)
📄 ftpget.c(2.59 KB)
📄 ftpgetinfo.c(2.86 KB)
📄 ftpgetresp.c(2.51 KB)
📄 ftpsget.c(2.89 KB)
📄 ftpupload.c(4.48 KB)
📄 ftpuploadfrommem.c(3.81 KB)
📄 ftpuploadresume.c(4.24 KB)
📄 getinfo.c(1.62 KB)
📄 getinmemory.c(3.24 KB)
📄 getredirect.c(2.3 KB)
📄 getreferrer.c(1.81 KB)
📄 ghiper.c(12.04 KB)
📄 hiperfifo.c(11.97 KB)
📄 href_extractor.c(2.61 KB)
📄 htmltidy.c(3.88 KB)
📄 htmltitle.cpp(6.23 KB)
📄 http-post.c(1.99 KB)
📄 http2-download.c(6.19 KB)
📄 http2-pushinmemory.c(5.02 KB)
📄 http2-serverpush.c(7.1 KB)
📄 http2-upload.c(8.05 KB)
📄 http3-present.c(1.53 KB)
📄 http3.c(1.81 KB)
📄 httpcustomheader.c(2.27 KB)
📄 httpput-postfields.c(3.36 KB)
📄 httpput.c(3.6 KB)
📄 https.c(2.53 KB)
📄 imap-append.c(3.77 KB)
📄 imap-authzid.c(2.21 KB)
📄 imap-copy.c(2.35 KB)
📄 imap-create.c(2.06 KB)
📄 imap-delete.c(2.06 KB)
📄 imap-examine.c(2.11 KB)
📄 imap-fetch.c(1.95 KB)
📄 imap-list.c(2.08 KB)
📄 imap-lsub.c(2.08 KB)
📄 imap-multi.c(2.29 KB)
📄 imap-noop.c(2 KB)
📄 imap-search.c(2.35 KB)
📄 imap-ssl.c(3.25 KB)
📄 imap-store.c(2.69 KB)
📄 imap-tls.c(3.5 KB)
📄 makefile.dj(1.58 KB)
📄 multi-app.c(3.36 KB)
📄 multi-debugcallback.c(4.21 KB)
📄 multi-double.c(2.62 KB)
📄 multi-event.c(6.01 KB)
📄 multi-formadd.c(3.23 KB)
📄 multi-legacy.c(5.13 KB)
📄 multi-post.c(3.04 KB)
📄 multi-single.c(2.49 KB)
📄 multi-uv.c(5.97 KB)
📄 multithread.c(2.59 KB)
📄 opensslthreadlock.c(2.69 KB)
📄 parseurl.c(2.13 KB)
📄 persistent.c(2.15 KB)
📄 pop3-authzid.c(2.18 KB)
📄 pop3-dele.c(2.15 KB)
📄 pop3-list.c(1.93 KB)
📄 pop3-multi.c(2.29 KB)
📄 pop3-noop.c(2.11 KB)
📄 pop3-retr.c(1.93 KB)
📄 pop3-ssl.c(3.22 KB)
📄 pop3-stat.c(2.13 KB)
📄 pop3-tls.c(3.47 KB)
📄 pop3-top.c(2.09 KB)
📄 pop3-uidl.c(2.03 KB)
📄 post-callback.c(5.15 KB)
📄 postinmemory.c(3.36 KB)
📄 postit2-formadd.c(3.51 KB)
📄 postit2.c(3.41 KB)
📄 progressfunc.c(4.8 KB)
📄 resolve.c(1.92 KB)
📄 rtsp.c(9.02 KB)
📄 sampleconv.c(3.25 KB)
📄 sendrecv.c(4.52 KB)
📄 sepheaders.c(2.67 KB)
📄 sessioninfo.c(3.06 KB)
📄 sftpget.c(3.25 KB)
📄 sftpuploadresume.c(3.82 KB)
📄 shared-connection-cache.c(2.51 KB)
📄 simple.c(1.68 KB)
📄 simplepost.c(1.83 KB)
📄 simplessl.c(4.56 KB)
📄 smooth-gtk-thread.c(6.01 KB)
📄 smtp-authzid.c(5.33 KB)
📄 smtp-expn.c(2.55 KB)
📄 smtp-mail.c(4.86 KB)
📄 smtp-mime.c(5.47 KB)
📄 smtp-multi.c(4.54 KB)
📄 smtp-ssl.c(5.75 KB)
📄 smtp-tls.c(6.21 KB)
📄 smtp-vrfy.c(2.62 KB)
📄 sslbackend.c(2.29 KB)
📄 synctime.c(12.6 KB)
📄 threaded-ssl.c(4.34 KB)
📄 url2file.c(2.43 KB)
📄 urlapi.c(1.98 KB)
📄 usercertinmem.c(8.87 KB)
📄 xmlstream.c(4.94 KB)

Editing: xmlstream.c

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2020, 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 https://curl.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.
 *
 ***************************************************************************/
/* <DESC>
 * Stream-parse a document using the streaming Expat parser.
 * </DESC>
 */
/* Written by David Strauss
 *
 * Expat => https://libexpat.github.io/
 *
 * gcc -Wall -I/usr/local/include xmlstream.c -lcurl -lexpat -o xmlstream
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>

#include <expat.h>
#include <curl/curl.h>

struct MemoryStruct {
  char *memory;
  size_t size;
};

struct ParserStruct {
  int ok;
  size_t tags;
  size_t depth;
  struct MemoryStruct characters;
};

static void startElement(void *userData, const XML_Char *name,
                         const XML_Char **atts)
{
  struct ParserStruct *state = (struct ParserStruct *) userData;
  state->tags++;
  state->depth++;

/* Get a clean slate for reading in character data. */
  free(state->characters.memory);
  state->characters.memory = NULL;
  state->characters.size = 0;
}

static void characterDataHandler(void *userData, const XML_Char *s, int len)
{
  struct ParserStruct *state = (struct ParserStruct *) userData;
  struct MemoryStruct *mem = &state->characters;

char *ptr = realloc(mem->memory, mem->size + len + 1);
  if(!ptr) {
    /* Out of memory. */
    fprintf(stderr, "Not enough memory (realloc returned NULL).\n");
    state->ok = 0;
    return;
  }

mem->memory = ptr;
  memcpy(&(mem->memory[mem->size]), s, len);
  mem->size += len;
  mem->memory[mem->size] = 0;
}

static void endElement(void *userData, const XML_Char *name)
{
  struct ParserStruct *state = (struct ParserStruct *) userData;
  state->depth--;

printf("%5lu   %10lu   %s\n", state->depth, state->characters.size, name);
}

static size_t parseStreamCallback(void *contents, size_t length, size_t nmemb,
                                  void *userp)
{
  XML_Parser parser = (XML_Parser) userp;
  size_t real_size = length * nmemb;
  struct ParserStruct *state = (struct ParserStruct *) XML_GetUserData(parser);

/* Only parse if we're not already in a failure state. */
  if(state->ok && XML_Parse(parser, contents, real_size, 0) == 0) {
    int error_code = XML_GetErrorCode(parser);
    fprintf(stderr, "Parsing response buffer of length %lu failed"
            " with error code %d (%s).\n",
            real_size, error_code, XML_ErrorString(error_code));
    state->ok = 0;
  }

return real_size;
}

int main(void)
{
  CURL *curl_handle;
  CURLcode res;
  XML_Parser parser;
  struct ParserStruct state;

/* Initialize the state structure for parsing. */
  memset(&state, 0, sizeof(struct ParserStruct));
  state.ok = 1;

/* Initialize a namespace-aware parser. */
  parser = XML_ParserCreateNS(NULL, '\0');
  XML_SetUserData(parser, &state);
  XML_SetElementHandler(parser, startElement, endElement);
  XML_SetCharacterDataHandler(parser, characterDataHandler);

/* Initialize a libcurl handle. */
  curl_global_init(CURL_GLOBAL_DEFAULT);
  curl_handle = curl_easy_init();
  curl_easy_setopt(curl_handle, CURLOPT_URL,
                   "https://www.w3schools.com/xml/simple.xml");
  curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, parseStreamCallback);
  curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)parser);

printf("Depth   Characters   Closing Tag\n");

/* Perform the request and any follow-up parsing. */
  res = curl_easy_perform(curl_handle);
  if(res != CURLE_OK) {
    fprintf(stderr, "curl_easy_perform() failed: %s\n",
            curl_easy_strerror(res));
  }
  else if(state.ok) {
    /* Expat requires one final call to finalize parsing. */
    if(XML_Parse(parser, NULL, 0, 1) == 0) {
      int error_code = XML_GetErrorCode(parser);
      fprintf(stderr, "Finalizing parsing failed with error code %d (%s).\n",
              error_code, XML_ErrorString(error_code));
    }
    else {
      printf("                     --------------\n");
      printf("                     %lu tags total\n", state.tags);
    }
  }

/* Clean up. */
  free(state.characters.memory);
  XML_ParserFree(parser);
  curl_easy_cleanup(curl_handle);
  curl_global_cleanup();

return 0;
}

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Editing: xmlstream.c

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