Major overhaul introducing http pipelining support and shared connection

cache within the multi handle.

tests/libtest/Makefile.am

@@ -41,7 +41,7 @@ SUPPORTFILES = first.c test.h
 # These are all libcurl test programs
 noinst_PROGRAMS = lib500 lib501 lib502 lib503 lib504 lib505 lib506 lib507 \
   lib508 lib509 lib510 lib511 lib512 lib513 lib514 lib515 lib516 lib517 \
-  lib518 lib519 lib520 lib521 lib523 lib524 lib525
+  lib518 lib519 lib520 lib521 lib523 lib524 lib525 lib526 lib527
 
 lib500_SOURCES = lib500.c $(SUPPORTFILES)
 lib500_LDADD = $(LIBDIR)/libcurl.la
@@ -142,3 +142,13 @@ lib524_DEPENDENCIES = $(LIBDIR)/libcurl.la
 lib525_SOURCES = lib525.c $(SUPPORTFILES)
 lib525_LDADD = $(LIBDIR)/libcurl.la
 lib525_DEPENDENCIES = $(LIBDIR)/libcurl.la
+
+lib526_SOURCES = lib526.c $(SUPPORTFILES)
+lib526_LDADD = $(LIBDIR)/libcurl.la
+lib526_DEPENDENCIES = $(LIBDIR)/libcurl.la
+
+lib527_SOURCES = lib526.c $(SUPPORTFILES)
+lib527_CFLAGS = -DLIB527
+lib527_LDADD = $(LIBDIR)/libcurl.la
+lib527_DEPENDENCIES = $(LIBDIR)/libcurl.la
+

tests/libtest/lib526.c

@@ -0,0 +1,129 @@
+/*****************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * $Id$
+ */
+
+/*
+ * This code sets up multiple easy handles that transfer a single file from
+ * the same URL, in a serial manner after each other. Due to the connection
+ * sharing within the multi handle all transfers are performed on the same
+ * persistent connection.
+ *
+ * This source code is used for lib526 _and_ lib527 with only #ifdefs
+ * controlling the small differences. lib526 closes all easy handles after
+ * they all have transfered the file over the single connection, while lib527
+ * closes each easy handle after each single transfer. 526 and 527 use FTP,
+ * while 528 uses the lib526 tool but use HTTP.
+ */
+
+#include "test.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#define NUM_HANDLES 4
+
+int test(char *URL)
+{
+  int res = 0;
+  CURL *curl[NUM_HANDLES];
+  int running;
+  char done=FALSE;
+  CURLM *m;
+  int current=0;
+  int i;
+
+  /* In windows, this will init the winsock stuff */
+  curl_global_init(CURL_GLOBAL_ALL);
+
+  /* get NUM_HANDLES easy handles */
+  for(i=0; i < NUM_HANDLES; i++) {
+    curl[i] = curl_easy_init();
+    if(!curl[i])
+      return 100 + i; /* major bad */
+    curl_easy_setopt(curl[i], CURLOPT_URL, URL);
+
+    /* go verbose */
+    curl_easy_setopt(curl[i], CURLOPT_VERBOSE, 1);
+  }
+
+  m = curl_multi_init();
+
+  res = (int)curl_multi_add_handle(m, curl[current]);
+
+  fprintf(stderr, "Start at URL 0\n");
+
+  while(!done) {
+    fd_set rd, wr, exc;
+    int max_fd;
+    struct timeval interval;
+
+    interval.tv_sec = 1;
+    interval.tv_usec = 0;
+
+    while (res == CURLM_CALL_MULTI_PERFORM) {
+      res = (int)curl_multi_perform(m, &running);
+      if (running <= 0) {
+#ifdef LIB527
+        curl_easy_cleanup(curl[current]);
+#endif
+        if(++current < NUM_HANDLES) {
+          fprintf(stderr, "Advancing to URL %d\n", current);
+          res = (int)curl_multi_add_handle(m, curl[current]);
+          if(res) {
+            fprintf(stderr, "add handle failed: %d.\n", res);
+            res = 243;
+            break;
+          }
+        }
+        else
+          done = TRUE; /* bail out */
+        break;
+      }
+    }
+    if(done)
+      break;
+
+    if (res != CURLM_OK) {
+      fprintf(stderr, "not okay???\n");
+      break;
+    }
+
+    FD_ZERO(&rd);
+    FD_ZERO(&wr);
+    FD_ZERO(&exc);
+    max_fd = 0;
+
+    if (curl_multi_fdset(m, &rd, &wr, &exc, &max_fd) != CURLM_OK) {
+      fprintf(stderr, "unexpected failured of fdset.\n");
+      res = 189;
+      break;
+    }
+
+    if (select(max_fd+1, &rd, &wr, &exc, &interval) == -1) {
+      fprintf(stderr, "bad select??\n");
+      res = 195;
+      break;
+    }
+
+    res = CURLM_CALL_MULTI_PERFORM;
+  }
+
+#ifndef LIB527
+  /* get NUM_HANDLES easy handles */
+  for(i=0; i < NUM_HANDLES; i++) {
+    curl_multi_remove_handle(m, curl[i]);
+    curl_easy_cleanup(curl[i]);
+  }
+#endif
+  curl_multi_cleanup(m);
+
+  curl_global_cleanup();
+  return res;
+}