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« on: June 09, 2014, 10:01:53 pm »
Heres another example of using wininet in your own (projects)
Two source files http.c & Http.h:
Note there is no (main function) on this project,
Current functions:
Http_init()
http_release()
http_get()
http_write_mem()
http_download_mem()
http_download_file();
If you need more of an explanation on what each function does, Please respond and ill be more then happy to give a tutorial on what they do & how to do it.
ReX
#include "http.h"
static HINTERNET http_handle = NULL;
bool http_init()
{
return (http_handle = InternetOpen(NULL, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0));
}
bool http_release()
{
return http_handle != NULL ? InternetCloseHandle(http_handle) : true;
}
bool http_get(const char *url, HTTP_CALLBACK cb, void *context)
{
DWORD size = sizeof(DWORD);
DWORD zero = 0;
unsigned int file_pos = 0;
unsigned int file_size = 0;
unsigned int http_code = 0;
HINTERNET req;
char buf[BUFSIZ];
if (http_handle == NULL)
{
return false;
}
req = InternetOpenUrl(http_handle, url, NULL, 0, INTERNET_FLAG_NO_COOKIES|INTERNET_FLAG_NO_CACHE_WRITE|INTERNET_FLAG_RELOAD, 0 /* context */);
if (req == NULL)
{
return false;
}
zero = 0;
HttpQueryInfo(req, HTTP_QUERY_CONTENT_LENGTH|HTTP_QUERY_FLAG_NUMBER, &file_size, &size, &zero);
zero = 0;
HttpQueryInfo(req, HTTP_QUERY_STATUS_CODE|HTTP_QUERY_FLAG_NUMBER, &http_code, &size, &zero);
if (http_code == 200)
{
while (InternetReadFile(req, buf, sizeof(buf), &size))
{
if (size == 0)
{
break;
}
file_pos += size;
if (cb)
{
if (cb((void *)buf, size, file_pos, file_size, context) == false)
{
break;
}
}
}
}
InternetCloseHandle(req);
return (http_code == 200);
}
bool http_write_mem(void *buf, size_t size, size_t file_pos, size_t file_size, download *dl)
{
if (file_size > dl->bufsiz || dl->bufpos + size > dl->bufsiz)
{
return false;
}
memcpy((char *)dl->buf + dl->bufpos, buf, size);
dl->bufpos += size;
return true;
}
int http_download_mem(const char *url, void *buf, size_t bufsiz)
{
static download dl;
dl.buf = buf;
dl.bufpos = 0;
dl.bufsiz = bufsiz;
return http_get(url, (HTTP_CALLBACK)http_write_mem, &dl);
}
bool http_write_file(void *buf, size_t size, size_t file_pos, size_t file_size, FILE *fh)
{
return fwrite(buf, size, 1, fh) == 1;
}
int http_download_file(const char *url, const char *path)
{
FILE *fh = fopen(path, "wb");
bool success = false;
if (fh)
{
success = http_get(url, (HTTP_CALLBACK)http_write_file, fh);
fclose(fh);
}
return success;
}
Http.h
#ifndef _HTTP_H_
#define _HTTP_H_
#include <windows.h>
#include <stdbool.h>
#include <stdio.h>
#include <wininet.h>
typedef struct
{
void *buf;
size_t bufpos;
size_t bufsiz;
} download;
typedef bool (*HTTP_CALLBACK)(void *buf, size_t len, size_t file_pos, size_t file_size, void *context);
bool http_init();
bool http_release();
bool http_get(const char *url, HTTP_CALLBACK cb, void *context);
bool http_write_mem(void *buf, size_t size, size_t file_pos, size_t file_size, download *dl);
int http_download_mem(const char *url, void *buf, size_t bufsiz);
int http_download_file(const char *url, const char *path);
#endif
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