PMHTTPNEWCLIENT - Online Linux Manual PageSection : 3
Updated : PCP
Source : Performance Co-Pilot

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NAMEpmhttpNewClient, pmhttpFreeClient, pmhttpClientFetch − simple HTTP client interfaces

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C SYNOPSIS#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

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DESCRIPTIONpmhttpNewClient 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.

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DIAGNOSTICSpmhttpNewClient 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.

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SEE ALSOpmdaapache(1), pmjsonInit(3), PMAPI(3), PMWEBAPI(3) and https://tools.ietf.org/html/rfc1630. 0

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