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NAME | C SYNOPSIS | DESCRIPTION | DIAGNOSTICS | SEE ALSO | COLOPHON |
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
request 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
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Performance Co-Pilot PCP PMHTTPNEWCLIENT(3)