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examples: added two programs doing multiplexed HTTP/2

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Daniel Stenberg 2015-05-28 15:58:34 +02:00
parent 44fe4b9029
commit e57f08863a
2 changed files with 639 additions and 0 deletions
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290
docs/examples/http2-download.c Normal file
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
/* somewhat unix-specific */
#include <sys/time.h>
#include <unistd.h>
/* curl stuff */
#include <curl/curl.h>
#ifndef CURLPIPE_MULTIPLEX
/* This little trick will just make sure that we don't enable pipelining for
libcurls old enough to not have this symbol. It is _not_ defined to zero in
a recent libcurl header. */
#define CURLPIPE_MULTIPLEX 0
#endif
#define NUM_HANDLES 1000
void *curl_hnd[NUM_HANDLES];
int num_transfers;
/* a handle to number lookup, highly ineffective when we do many
transfers... */
static int hnd2num(CURL *hnd)
{
int i;
for(i=0; i< num_transfers; i++) {
if(curl_hnd[i] == hnd)
return i;
}
return 0; /* weird, but just a fail-safe */
}
static
void dump(const char *text, int num, unsigned char *ptr, size_t size,
char nohex)
{
size_t i;
size_t c;
unsigned int width=0x10;
if(nohex)
/* without the hex output, we can fit more on screen */
width = 0x40;
fprintf(stderr, "%d %s, %ld bytes (0x%lx)\n",
num, text, (long)size, (long)size);
for(i=0; i<size; i+= width) {
fprintf(stderr, "%4.4lx: ", (long)i);
if(!nohex) {
/* hex not disabled, show it */
for(c = 0; c < width; c++)
if(i+c < size)
fprintf(stderr, "%02x ", ptr[i+c]);
else
fputs(" ", stderr);
}
for(c = 0; (c < width) && (i+c < size); c++) {
/* check for 0D0A; if found, skip past and start a new line of output */
if (nohex && (i+c+1 < size) && ptr[i+c]==0x0D && ptr[i+c+1]==0x0A) {
i+=(c+2-width);
break;
}
fprintf(stderr, "%c",
(ptr[i+c]>=0x20) && (ptr[i+c]<0x80)?ptr[i+c]:'.');
/* check again for 0D0A, to avoid an extra \n if it's at width */
if (nohex && (i+c+2 < size) && ptr[i+c+1]==0x0D && ptr[i+c+2]==0x0A) {
i+=(c+3-width);
break;
}
}
fputc('\n', stderr); /* newline */
}
}
static
int my_trace(CURL *handle, curl_infotype type,
char *data, size_t size,
void *userp)
{
const char *text;
int num = hnd2num(handle);
(void)handle; /* prevent compiler warning */
(void)userp;
switch (type) {
case CURLINFO_TEXT:
fprintf(stderr, "== %d Info: %s", num, data);
default: /* in case a new one is introduced to shock us */
return 0;
case CURLINFO_HEADER_OUT:
text = "=> Send header";
break;
case CURLINFO_DATA_OUT:
text = "=> Send data";
break;
case CURLINFO_SSL_DATA_OUT:
text = "=> Send SSL data";
break;
case CURLINFO_HEADER_IN:
text = "<= Recv header";
break;
case CURLINFO_DATA_IN:
text = "<= Recv data";
break;
case CURLINFO_SSL_DATA_IN:
text = "<= Recv SSL data";
break;
}
dump(text, num, (unsigned char *)data, size, 1);
return 0;
}
static void setup(CURL *hnd, int num)
{
FILE *out;
char filename[128];
sprintf(filename, "dl-%d", num);
out = fopen(filename, "wb");
/* write to this file */
curl_easy_setopt(hnd, CURLOPT_WRITEDATA, out);
/* get the same URL for now */
curl_easy_setopt(hnd, CURLOPT_URL, "https://localhost:8443/index.html");
/* send it verbose for max debuggaility */
curl_easy_setopt(hnd, CURLOPT_VERBOSE, 1L);
curl_easy_setopt(hnd, CURLOPT_DEBUGFUNCTION, my_trace);
/* HTTP/2 please */
curl_easy_setopt(hnd, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);
/* we use a self-signed test server, skip verification during debugging */
curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYPEER, 0L);
curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYHOST, 0L);
#ifdef CURLPIPE_MULTIPLEX
/* wait for pipe connection to confirm */
curl_easy_setopt(hnd, CURLOPT_PIPEWAIT, 1L);
#endif
curl_hnd[num] = hnd;
}
/*
* Simply download two files over HTTP/2, using the same physical connection!
*/
int main(int argc, char **argv)
{
CURL *easy[NUM_HANDLES];
CURLM *multi_handle;
int i;
int still_running; /* keep number of running handles */
if(argc > 1)
/* if given a number, do that many transfers */
num_transfers = atoi(argv[1]);
if(!num_transfers || (num_transfers > NUM_HANDLES))
num_transfers = 3; /* a suitable low default */
/* init a multi stack */
multi_handle = curl_multi_init();
for(i=0; i<num_transfers; i++) {
easy[i] = curl_easy_init();
/* set options */
setup(easy[i], i);
/* add the individual transfer */
curl_multi_add_handle(multi_handle, easy[i]);
}
/* For now (at least) we use bit 1 in the pipelining option to switch on
HTTP/2 multiplexing */
curl_multi_setopt(multi_handle, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
/* we start some action by calling perform right away */
curl_multi_perform(multi_handle, &still_running);
do {
struct timeval timeout;
int rc; /* select() return code */
CURLMcode mc; /* curl_multi_fdset() return code */
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
int maxfd = -1;
long curl_timeo = -1;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
/* set a suitable timeout to play around with */
timeout.tv_sec = 1;
timeout.tv_usec = 0;
curl_multi_timeout(multi_handle, &curl_timeo);
if(curl_timeo >= 0) {
timeout.tv_sec = curl_timeo / 1000;
if(timeout.tv_sec > 1)
timeout.tv_sec = 1;
else
timeout.tv_usec = (curl_timeo % 1000) * 1000;
}
/* get file descriptors from the transfers */
mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
if(mc != CURLM_OK)
{
fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
break;
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}
switch(rc) {
case -1:
/* select error */
break;
case 0:
default:
/* timeout or readable/writable sockets */
curl_multi_perform(multi_handle, &still_running);
break;
}
} while(still_running);
curl_multi_cleanup(multi_handle);
for(i=0; i<num_transfers; i++)
curl_easy_cleanup(easy[i]);
return 0;
}

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docs/examples/http2-upload.c Normal file
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@ -0,0 +1,349 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/stat.h>
/* somewhat unix-specific */
#include <sys/time.h>
#include <unistd.h>
/* curl stuff */
#include <curl/curl.h>
#ifndef CURLPIPE_MULTIPLEX
/* This little trick will just make sure that we don't enable pipelining for
libcurls old enough to not have this symbol. It is _not_ defined to zero in
a recent libcurl header. */
#define CURLPIPE_MULTIPLEX 0
#endif
#define NUM_HANDLES 1000
void *curl_hnd[NUM_HANDLES];
int num_transfers;
/* a handle to number lookup, highly ineffective when we do many
transfers... */
static int hnd2num(CURL *hnd)
{
int i;
for(i=0; i< num_transfers; i++) {
if(curl_hnd[i] == hnd)
return i;
}
return 0; /* weird, but just a fail-safe */
}
static
void dump(const char *text, int num, unsigned char *ptr, size_t size,
char nohex)
{
size_t i;
size_t c;
unsigned int width=0x10;
if(nohex)
/* without the hex output, we can fit more on screen */
width = 0x40;
fprintf(stderr, "%d %s, %ld bytes (0x%lx)\n",
num, text, (long)size, (long)size);
for(i=0; i<size; i+= width) {
fprintf(stderr, "%4.4lx: ", (long)i);
if(!nohex) {
/* hex not disabled, show it */
for(c = 0; c < width; c++)
if(i+c < size)
fprintf(stderr, "%02x ", ptr[i+c]);
else
fputs(" ", stderr);
}
for(c = 0; (c < width) && (i+c < size); c++) {
/* check for 0D0A; if found, skip past and start a new line of output */
if (nohex && (i+c+1 < size) && ptr[i+c]==0x0D && ptr[i+c+1]==0x0A) {
i+=(c+2-width);
break;
}
fprintf(stderr, "%c",
(ptr[i+c]>=0x20) && (ptr[i+c]<0x80)?ptr[i+c]:'.');
/* check again for 0D0A, to avoid an extra \n if it's at width */
if (nohex && (i+c+2 < size) && ptr[i+c+1]==0x0D && ptr[i+c+2]==0x0A) {
i+=(c+3-width);
break;
}
}
fputc('\n', stderr); /* newline */
}
}
static
int my_trace(CURL *handle, curl_infotype type,
char *data, size_t size,
void *userp)
{
char timebuf[20];
const char *text;
int num = hnd2num(handle);
static time_t epoch_offset;
static int known_offset;
struct timeval tv;
time_t secs;
struct tm *now;
(void)handle; /* prevent compiler warning */
(void)userp;
gettimeofday(&tv, NULL);
if(!known_offset) {
epoch_offset = time(NULL) - tv.tv_sec;
known_offset = 1;
}
secs = epoch_offset + tv.tv_sec;
now = localtime(&secs); /* not thread safe but we don't care */
snprintf(timebuf, sizeof(timebuf), "%02d:%02d:%02d.%06ld",
now->tm_hour, now->tm_min, now->tm_sec, (long)tv.tv_usec);
switch (type) {
case CURLINFO_TEXT:
fprintf(stderr, "%s [%d] Info: %s", timebuf, num, data);
default: /* in case a new one is introduced to shock us */
return 0;
case CURLINFO_HEADER_OUT:
text = "=> Send header";
break;
case CURLINFO_DATA_OUT:
text = "=> Send data";
break;
case CURLINFO_SSL_DATA_OUT:
text = "=> Send SSL data";
break;
case CURLINFO_HEADER_IN:
text = "<= Recv header";
break;
case CURLINFO_DATA_IN:
text = "<= Recv data";
break;
case CURLINFO_SSL_DATA_IN:
text = "<= Recv SSL data";
break;
}
dump(text, num, (unsigned char *)data, size, 1);
return 0;
}
struct input {
FILE *in;
size_t bytes_read; /* count up */
CURL *hnd;
};
static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *userp)
{
struct input *i = userp;
size_t retcode = fread(ptr, size, nmemb, i->in);
i->bytes_read += retcode;
return retcode;
}
struct input indata[NUM_HANDLES];
static void setup(CURL *hnd, int num, const char *upload)
{
FILE *out;
char url[256];
char filename[128];
struct stat file_info;
curl_off_t uploadsize;
sprintf(filename, "dl-%d", num);
out = fopen(filename, "wb");
sprintf(url, "https://localhost:8443/upload-%d", num);
/* get the file size of the local file */
stat(upload, &file_info);
uploadsize = file_info.st_size;
indata[num].in = fopen(upload, "rb");
indata[num].hnd = hnd;
/* write to this file */
curl_easy_setopt(hnd, CURLOPT_WRITEDATA, out);
/* we want to use our own read function */
curl_easy_setopt(hnd, CURLOPT_READFUNCTION, read_callback);
/* read from this file */
curl_easy_setopt(hnd, CURLOPT_READDATA, &indata[num]);
/* provide the size of the upload */
curl_easy_setopt(hnd, CURLOPT_INFILESIZE_LARGE, uploadsize);
/* send in the URL to store the upload as */
curl_easy_setopt(hnd, CURLOPT_URL, url);
/* upload please */
curl_easy_setopt(hnd, CURLOPT_UPLOAD, 1L);
/* send it verbose for max debuggaility */
curl_easy_setopt(hnd, CURLOPT_VERBOSE, 1L);
curl_easy_setopt(hnd, CURLOPT_DEBUGFUNCTION, my_trace);
/* HTTP/2 please */
curl_easy_setopt(hnd, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);
/* we use a self-signed test server, skip verification during debugging */
curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYPEER, 0L);
curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYHOST, 0L);
curl_hnd[num] = hnd;
}
/*
* Upload all files over HTTP/2, using the same physical connection!
*/
int main(int argc, char **argv)
{
CURL *easy[NUM_HANDLES];
CURLM *multi_handle;
int i;
int still_running; /* keep number of running handles */
const char *filename = "index.html";
if(argc > 1)
/* if given a number, do that many transfers */
num_transfers = atoi(argv[1]);
if(argc > 2)
/* if given a file name, upload this! */
filename = argv[2];
if(!num_transfers || (num_transfers > NUM_HANDLES))
num_transfers = 3; /* a suitable low default */
/* init a multi stack */
multi_handle = curl_multi_init();
for(i=0; i<num_transfers; i++) {
easy[i] = curl_easy_init();
/* set options */
setup(easy[i], i, filename);
/* add the individual transfer */
curl_multi_add_handle(multi_handle, easy[i]);
}
/* For now (at least) we use bit 1 in the pipelining option to switch on
HTTP/2 multiplexing */
curl_multi_setopt(multi_handle, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
/* We do HTTP/2 so let's stick to one connection per host */
curl_multi_setopt(multi_handle, CURLMOPT_MAX_HOST_CONNECTIONS, 1L);
/* we start some action by calling perform right away */
curl_multi_perform(multi_handle, &still_running);
do {
struct timeval timeout;
int rc; /* select() return code */
CURLMcode mc; /* curl_multi_fdset() return code */
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
int maxfd = -1;
long curl_timeo = -1;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
/* set a suitable timeout to play around with */
timeout.tv_sec = 1;
timeout.tv_usec = 0;
curl_multi_timeout(multi_handle, &curl_timeo);
if(curl_timeo >= 0) {
timeout.tv_sec = curl_timeo / 1000;
if(timeout.tv_sec > 1)
timeout.tv_sec = 1;
else
timeout.tv_usec = (curl_timeo % 1000) * 1000;
}
/* get file descriptors from the transfers */
mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
if(mc != CURLM_OK)
{
fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
break;
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}
switch(rc) {
case -1:
/* select error */
break;
case 0:
default:
/* timeout or readable/writable sockets */
curl_multi_perform(multi_handle, &still_running);
break;
}
} while(still_running);
curl_multi_cleanup(multi_handle);
for(i=0; i<num_transfers; i++)
curl_easy_cleanup(easy[i]);
return 0;
}