how to fetch a html page use socket

Question

4.00/5 (1 vote)

See more:

hi all

i use socket to fetch the html page

and the request tag "Accept-Encoding:gzip" so i recieve a compress data

i try use zlib to uncompress but i failed when i call function inflate

i use the code follow:

C++

#define CHUNK 16384
int inflate_read(char *source,int len,char **dest,int gzip) 
{ 
	int ret; 
	unsigned have; 
	z_stream strm; 
	unsigned char out[CHUNK] = {0}; 
	int totalsize = 0; 

	/* allocate inflate state */ 
	strm.zalloc = Z_NULL; 
	strm.zfree = Z_NULL; 
	strm.opaque = Z_NULL; 
	strm.avail_in = 0; 
	strm.next_in = Z_NULL; 

	if(gzip) 
		ret = inflateInit2(&strm, 47); 
	else 
		ret = inflateInit(&strm); 

	if (ret != Z_OK) 
		return ret; 

	strm.avail_in = len; 
	strm.next_in = (Bytef*)source; 

	/* run inflate() on input until output buffer not full */ 
	do { 
		strm.avail_out = CHUNK; 
		strm.next_out = out; 
		ret = inflate(&strm, Z_NO_FLUSH); 
		assert(ret != Z_STREAM_ERROR); /* state not clobbered */ 
		switch (ret) { 
		case Z_NEED_DICT: 
			ret = Z_DATA_ERROR; /* and fall through */ 
		case Z_DATA_ERROR: 
		case Z_MEM_ERROR: 
			inflateEnd(&strm); 
			return ret; 
		} 
		have = CHUNK - strm.avail_out; 
		totalsize += have; 
		*dest = (char*)realloc(*dest,totalsize); 
		memcpy(*dest + totalsize - have,out,have); 
	} while (strm.avail_out == 0); 

	/* clean up and return */ 
	(void)inflateEnd(&strm); 
	return ret == Z_STREAM_END ? Z_OK : Z_DATA_ERROR; 
}

someone can help me how to uncompress data and uncompress data with "Transfer-Encoding: chunked"

thank you

Posted 3-Jan-12 18:46pm

jeansea

Add a Solution

Comments

Albert Holguin 8-Jan-12 1:33am

This looks like C... are you sure it's tagged correctly? Also, posting a solution to your question moves your question out of the "unanswered" category, reducing your odds of getting help, so don't do that in the future.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

infant_coder · Answer 1 · 2012-05-13T23:28:00

This code gets html page. Put html page's address to fetch instead of http://example.com. Below posted code is from http://curl.haxx.se/libcurl/c/simple.html[^]

C++

#include <stdio.h>
#include 
 
int main(void)
{
  CURL *curl;
  CURLcode res;
 
  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
    res = curl_easy_perform(curl);
 
    /* always cleanup */ 
    curl_easy_cleanup(curl);
  }
  return 0;
}
Y</stdio.h>