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.TH CURLOPT_ACCEPT_ENCODING 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_ACCEPT_ENCODING \- enables automatic decompression of HTTP downloads
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ACCEPT_ENCODING, char *enc);
.SH DESCRIPTION
Pass a char * argument specifying what encoding you'd like.

Sets the contents of the Accept-Encoding: header sent in a HTTP request, and
enables decoding of a response when a Content-Encoding: header is received.
Three encodings are supported: \fIidentity\fP, meaning non-compressed,
\fIdeflate\fP which requests the server to compress its response using the
zlib algorithm, and \fIgzip\fP which requests the gzip algorithm.

If a zero-length string is set like "", then an Accept-Encoding: header
containing all built-in supported encodings is sent.

Set this option to NULL to explicitly disable it, which makes libcurl not send
an Accept-Encoding: header and not decompress contents automatically.

You can also opt to just include the Accept-Encoding: header in your request
with \fICURLOPT_HTTPHEADER(3)\fP but then there will be no automatic
decompressing when receiving data.

This is a request, not an order; the server may or may not do it.  This option
must be set (to any non-NULL value) or else any unsolicited encoding done by
the server is ignored.

Servers might respond with Content-Encoding even without getting a
Accept-Encoding: in the request. Servers might respond with a different
Content-Encoding than what was asked for in the request.

The Content-Length: servers send for a compressed response is supposed to
indicate the length of the compressed content so when auto decoding is enabled
it may not match the sum of bytes reported by the write callbacks (although,
sending the length of the non-compressed content is a common server mistake).
.SH DEFAULT
NULL
.SH PROTOCOLS
HTTP
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");

  /* enable all supported built-in compressions */
  curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "");

  /* Perform the request */
  curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
This option was called CURLOPT_ENCODING before 7.21.6
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_TRANSFER_ENCODING "(3), " CURLOPT_HTTPHEADER "(3), "
.BR CURLOPT_HTTP_CONTENT_DECODING "(3), "