---
name: "CURLOPT_TRANSFER_ENCODING"
section: "3"
platform: "macos"
package: "curl"
version: "166.0.0.0.1"
release: "macOS 26.5"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLOPT_TRANSFER_ENCODING"
---

# CURLOPT\_TRANSFER\_ENCODING(3)

ask for HTTP Transfer Encoding

## NAME

CURLOPT\_TRANSFER\_ENCODING - ask for HTTP Transfer Encoding

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TRANSFER_ENCODING,
                          long enable);
```

## DESCRIPTION

Pass a long set to 1L to *enable* or 0 to disable.

Adds a request for compressed Transfer Encoding in the outgoing HTTP request. If the server supports this and so desires, it can respond with the HTTP response sent using a compressed Transfer-Encoding that is automatically uncompressed by libcurl on reception.

Transfer-Encoding differs slightly from the Content-Encoding you ask for with *[CURLOPT\_ACCEPT\_ENCODING(3)](/CURLOPT_ACCEPT_ENCODING/3.md)* in that a Transfer-Encoding is strictly meant to be for the transfer and thus MUST be decoded before the data arrives in the client. Traditionally, Transfer-Encoding has been much less used and supported by both HTTP clients and HTTP servers.

## DEFAULT

0

## PROTOCOLS

HTTP

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
    curl_easy_setopt(curl, CURLOPT_TRANSFER_ENCODING, 1L);
    curl_easy_perform(curl);
  }
}
```

## AVAILABILITY

Added in 7.21.6

## RETURN VALUE

Returns CURLE\_OK if the option is supported, and CURLE\_UNKNOWN\_OPTION if not.

## SEE ALSO

[**CURLOPT\_ACCEPT\_ENCODING**(3)](/CURLOPT_ACCEPT_ENCODING/3.md), [**CURLOPT\_HTTP\_TRANSFER\_DECODING**(3)](/CURLOPT_HTTP_TRANSFER_DECODING/3.md)