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Man Pages


Manual Reference Pages  -  CURLOPT_READDATA (3)

NAME

CURLOPT_READDATA - custom pointer passed to the read callback

CONTENTS

Synopsis
Description
Default
Protocols
Example
Availability
Return Value

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_READDATA, void *pointer);

DESCRIPTION

Data pointer to pass to the file read function. If you use the CURLOPT_READFUNCTION(3) option, this is the pointer you’ll get as input in the 4th argument to the callback.

If you don’t specify a read callback but instead rely on the default internal read function, this data must be a valid readable FILE * (cast to ’void *’).

If you’re using libcurl as a win32 DLL, you MUST use a CURLOPT_READFUNCTION(3) if you set this option.

DEFAULT

By default, this is a FILE * to stdin.

PROTOCOLS

This is used for all protocols when sending data.

EXAMPLE

CURL *curl = curl_easy_init();
struct MyData this;
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");

/* pass pointer that gets passed in to the CURLOPT_READFUNCTION callback */ curl_easy_setopt(curl, CURLOPT_READDATA, &this);

curl_easy_perform(curl); }

AVAILABILITY

This option was once known by the older name CURLOPT_INFILE, the name CURLOPT_READDATA was introduced in 7.9.7.

RETURN VALUE

This will return CURLE_OK.

SEE ALSO

CURLOPT_READFUNCTION(3), CURLOPT_WRITEDATA(3),
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libcurl 7.37.0 CURLOPT_READDATA (3) 16 Jun 2014

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