Commit 7e4daaf9 authored by Rob Ward's avatar Rob Ward Committed by Daniel Stenberg
Browse files

progress function example: include timed interval 

Adds a timer based off of CURLINFO_TOTAL_TIME that is used to perform
certain actions after a minimum amount of time has passed using the
progress function. As a consequence the curl handle is now also passed
into the progress function. Progress example now also includes an
example of how to retreive the TOTAL_TIME and print it out.
parent 3bbe219b

docs/examples/progressfunc.c

+27 −1
Original line number Diff line number Diff line
@@ -23,11 +23,31 @@ 
#include <curl/curl.h>



#define STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES         6000

#define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL     3



struct myprogress {

  double lastruntime;

  CURL *curl;

};



static int progress(void *p,

                    double dltotal, double dlnow,

                    double ultotal, double ulnow)

{

  struct myprogress *myp = (struct myprogress *)p;

  CURL *curl = myp->curl;

  double curtime = 0;



  curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME, &curtime);



  /* under certain circumstances it may be desirable for certain functionality

     to only run every N seconds, in order to do this the transaction time can

     be used */

  if((curtime - myp->lastruntime) >= MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL) {

    myp->lastruntime = curtime;

    fprintf(stderr, "TOTAL TIME: %f \r\n", curtime);

  }



  fprintf(stderr, "UP: %g of %g  DOWN: %g of %g\r\n",

          ulnow, ultotal, dlnow, dltotal);
@@ -40,11 +60,17 @@ int main(void) 
{

  CURL *curl;

  CURLcode res=0;

  struct myprogress prog;



  curl = curl_easy_init();

  if(curl) {

    prog.lastruntime = 0;

    prog.curl = curl;



    curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/");

    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress);

    /* pass the struct pointer into the progress function */

    curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &prog);

    curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);

    res = curl_easy_perform(curl);