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NAME | C SYNOPSIS | DESCRIPTION | DIAGNOSTICS | SEE ALSO | COLOPHON |
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PMHTTPNEWCLIENT(3) Library Functions Manual PMHTTPNEWCLIENT(3)
pmhttpNewClient, pmhttpFreeClient, pmhttpClientFetch - simple HTTP
client interfaces
#include <pcp/pmapi.h>
#include <pcp/pmhttp.h>
struct http_client *pmhttpNewClient(void);
void pmhttpFreeClient(struct http_client *client);
int pmhttpClientFetch(struct http_client *client, const char *url,
char *bodybuf, size_t bodylen, char *typebuf, size_t
typelen);
cc ... -lpcp_web
pmhttpNewClient allocates and initializes an opaque HTTP client
that is ready to make requests from a server.
The URL request interface pmhttpClientFetch issues an HTTP GET re‐
quest to the server specified in the supplied url. The body of
the response is returned in the caller supplied bodybuf buffer, of
bodylen bytes length. An optional typebuf buffer, of typelen
bytes length, can also be supplied and (if non-NULL) will contain
the value of the content-type header returned from the server.
The url parameter is an RFC1630 format URL. This will typically
be prefixed with "http://", however these interfaces also support
Unix domain sockets. Those are instead prefixed by "unix://",
followed by the full filesystem path to the desired Unix domain
socket.
To free up resources associated with an HTTP client, including
closing any persistent server connection that has been established
earlier, is accomplished using the pmhttpFreeClient routine.
pmhttpNewClient will return NULL on failure, which can only occur
when allocation of memory is not possible.
pmhttpClientFetch will return the number of bytes places into the
bodybuf buffer, else a negated error code indicating the nature of
the failure.
pmdaapache(1), pmjsonInit(3), PMAPI(3), PMWEBAPI(3) and
https://tools.ietf.org/html/rfc1630 .
This page is part of the PCP (Performance Co-Pilot) project. In‐
formation about the project can be found at ⟨http://www.pcp.io/⟩.
If you have a bug report for this manual page, send it to
pcp@groups.io. This page was obtained from the project's upstream
Git repository ⟨https://github.com/performancecopilot/pcp.git⟩ on
2025-02-02. (At that time, the date of the most recent commit
that was found in the repository was 2025-01-30.) If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a
mail to man-pages@man7.org
Performance Co-Pilot PCP PMHTTPNEWCLIENT(3)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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