svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
CURLOPT_HTTPHEADER(3)
CURLOPT_HTTPHEADER(3) curl_easy_setopt options CURLOPT_HTTPHEADER(3)
NAME
CURLOPT_HTTPHEADER - set of HTTP headers
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTPHEADER,
struct curl_slist *headers);
DESCRIPTION
Pass a pointer to a linked list of HTTP headers to pass to the server
and/or proxy in your HTTP request. The same list can be used for both
host and proxy requests!
When used within an IMAP or SMTP request to upload a MIME mail, the
given header list establishes the document-level MIME headers to
prepend to the uploaded document described by CURLOPT_MIMEPOST(3). This
does not affect raw mail uploads.
The linked list should be a fully valid list of struct curl_slist
structs properly filled in. Use curl_slist_append(3) to create the list
and curl_slist_free_all(3) to clean up an entire list. If you add a
header that is otherwise generated and used by libcurl internally, your
added one will be used instead. If you add a header with no content as
in 'Accept:' (no data on the right side of the colon), the internally
used header will get disabled. With this option you can add new head‐
ers, replace internal headers and remove internal headers. To add a
header with no content (nothing to the right side of the colon), use
the form 'name;' (note the ending semicolon).
The headers included in the linked list must not be CRLF-terminated,
because libcurl adds CRLF after each header item. Failure to comply
with this will result in strange bugs because the server will most
likely ignore part of the headers you specified.
The first line in an HTTP request (containing the method, usually a GET
or POST) is not a header and cannot be replaced using this option. Only
the lines following the request-line are headers. Adding this method
line in this list of headers will only cause your request to send an
invalid header. Use CURLOPT_CUSTOMREQUEST(3) to change the method.
When this option is passed to curl_easy_setopt(3), libcurl will not
copy the entire list so you must keep it around until you no longer use
this handle for a transfer before you call curl_slist_free_all(3) on
the list.
Pass a NULL to this option to reset back to no custom headers.
The most commonly replaced HTTP headers have "shortcuts" in the options
CURLOPT_COOKIE(3), CURLOPT_USERAGENT(3) and CURLOPT_REFERER(3). We rec‐
ommend using those.
There's an alternative option that sets or replaces headers only for
requests that are sent with CONNECT to a proxy: CURLOPT_PROXYHEADER(3).
Use CURLOPT_HEADEROPT(3) to control the behavior.
SPECIFIC HTTP HEADERS
Setting some specific headers will cause libcurl to act differently.
Host: The specified host name will be used for cookie matching if the
cookie engine is also enabled for this transfer. If the request
is done over HTTP/2 or HTTP/3, the custom host name will instead
be used in the ":authority" header field and Host: will not be
sent at all over the wire.
Transfer-Encoding: chunked
Tells libcurl the upload is to be done using this chunked encod‐
ing instead of providing the Content-Length: field in the re‐
quest.
SPECIFIC MIME HEADERS
When used to build a MIME e-mail for IMAP or SMTP, the following docu‐
ment-level headers can be set to override libcurl-generated values:
Mime-Version:
Tells the parser at the receiving site how to interpret the MIME
framing. It defaults to "1.0" and should normally not be al‐
tered.
Content-Type:
Indicates the document's global structure type. By default,
libcurl sets it to "multipart/mixed", describing a document made
of independent parts. When a MIME mail is only composed of al‐
ternative representations of the same data (i.e.: HTML and plain
text), this header must be set to "multipart/alternative". In
all cases the value must be of the form "multipart/*" to respect
the document structure and may not include the "boundary=" para‐
meter.
Other specific headers that do not have a libcurl default value but are
strongly desired by mail delivery and user agents should also be in‐
cluded. These are "From:", "To:", "Date:" and "Subject:" among others
and their presence and value is generally checked by anti-spam utili‐
ties.
SECURITY CONCERNS
By default, this option makes libcurl send the given headers in all
HTTP requests done by this handle. You should therefore use this option
with caution if you for example connect to the remote site using a
proxy and a CONNECT request, you should to consider if that proxy is
supposed to also get the headers. They may be private or otherwise sen‐
sitive to leak.
Use CURLOPT_HEADEROPT(3) to make the headers only get sent to where you
intend them to get sent.
Custom headers are sent in all requests done by the easy handles, which
implies that if you tell libcurl to follow redirects (CURLOPT_FOLLOWLO‐
CATION(3)), the same set of custom headers will be sent in the subse‐
quent request. Redirects can of course go to other hosts and thus those
servers will get all the contents of your custom headers too.
Starting in 7.58.0, libcurl will specifically prevent "Authorization:"
headers from being sent to other hosts than the first used one, unless
specifically permitted with the CURLOPT_UNRESTRICTED_AUTH(3) option.
Starting in 7.64.0, libcurl will specifically prevent "Cookie:" headers
from being sent to other hosts than the first used one, unless specifi‐
cally permitted with the CURLOPT_UNRESTRICTED_AUTH(3) option.
DEFAULT
NULL
PROTOCOLS
HTTP, IMAP and SMTP
EXAMPLE
CURL *curl = curl_easy_init();
struct curl_slist *list = NULL;
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
list = curl_slist_append(list, "Shoesize: 10");
list = curl_slist_append(list, "Accept:");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);
curl_easy_perform(curl);
curl_slist_free_all(list); /* free the list */
}
AVAILABILITY
As long as HTTP is enabled. Use in MIME mail added in 7.56.0.
RETURN VALUE
Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
SEE ALSO
CURLOPT_CUSTOMREQUEST(3), CURLOPT_HEADEROPT(3), CURLOPT_PROXYHEADER(3),
CURLOPT_HEADER(3), CURLOPT_MIMEPOST(3), curl_mime_init(3)
libcurl 7.86.0 September 28, 2022 CURLOPT_HTTPHEADER(3)