h2load: Support multiple URIs

Supplying multiple URIs can simulate more real life situation on
server side.  For example, we can supply URIs of html, css and js and
benchmark the server.  The -m option is updated so that it defaults to
the number of supplied URIs.

src/h2load.cc

@@ -63,7 +63,7 @@ Config::Config()
     nreqs(1),
     nclients(1),
     nthreads(1),
-    max_concurrent_streams(1),
+    max_concurrent_streams(-1),
     window_bits(16),
     connection_window_bits(16),
     port(0),
@@ -111,6 +111,7 @@ Client::Client(Worker *worker)
     ssl(nullptr),
     bev(nullptr),
     next_addr(config.addrs),
+    reqidx(0),
     state(CLIENT_IDLE)
 {}
 
@@ -279,7 +280,7 @@ int Client::on_connect()
 
   auto nreq = std::min(worker->stats.req_todo - worker->stats.req_started,
                        std::min(worker->stats.req_todo / worker->clients.size(),
-                                config.max_concurrent_streams));
+                                (size_t)config.max_concurrent_streams));
   for(; nreq > 0; --nreq) {
     submit_request();
   }
@@ -499,6 +500,26 @@ void resolve_host()
 }
 } // namespace
 
+namespace {
+std::string get_reqline(const char *uri, const http_parser_url& u)
+{
+  std::string reqline;
+
+  if(util::has_uri_field(u, UF_PATH)) {
+    reqline = util::get_uri_field(uri, u, UF_PATH);
+  } else {
+    reqline = "/";
+  }
+
+  if(util::has_uri_field(u, UF_QUERY)) {
+    reqline += "?";
+    reqline += util::get_uri_field(uri, u, UF_QUERY);
+  }
+
+  return reqline;
+}
+} // namespace
+
 namespace {
 int client_select_next_proto_cb(SSL* ssl,
                                 unsigned char **out, unsigned char *outlen,
@@ -527,7 +548,7 @@ void print_version(std::ostream& out)
 namespace {
 void print_usage(std::ostream& out)
 {
-  out << R"(Usage: h2load [OPTIONS]... <URI>
+  out << R"(Usage: h2load [OPTIONS]... <URI>...
 benchmarking tool for HTTP/2 and SPDY server)" << std::endl;
 }
 } // namespace
@@ -538,7 +559,13 @@ void print_help(std::ostream& out)
   print_usage(out);
 
   out << R"(
-  <URI>              Specify URI to access.
+  <URI>              Specify  URI to  access.   Multiple  URIs can  be
+                     specified.  URIs are used  in this order for each
+                     client.   All URIs  are used,  then first  URI is
+                     used and  then 2nd URI,  and so on.   The scheme,
+                     host and port in the subsequent URIs, if present,
+                     are  ignored.  Those  in the  first URI  are used
+                     solely.
 Options:
   -n, --requests=<N> Number of requests. Default: )"
       << config.nreqs << R"(
@@ -546,10 +573,10 @@ Options:
       << config.nclients << R"(
   -t, --threads=<N>  Number of native threads. Default: )"
       << config.nthreads << R"(
-  -m, --max-concurrent-streams=<N>
-                     Max concurrent streams to issue per session.
-                     Default: )"
-      << config.max_concurrent_streams << R"(
+  -m, --max-concurrent-streams=(auto|<N>)
+                     Max concurrent streams to  issue per session.  If
+                     "auto"  is given,  the  number of  given URIs  is
+                     used.  Default: auto
   -w, --window-bits=<N>
                      Sets  the stream  level  initial  window size  to
                      (2**<N>)-1.  For SPDY, 2**<N> is used instead.
@@ -598,7 +625,11 @@ int main(int argc, char **argv)
       config.nthreads = strtoul(optarg, nullptr, 10);
       break;
     case 'm':
+      if(util::strieq("auto", optarg)) {
+        config.max_concurrent_streams = -1;
+      } else {
         config.max_concurrent_streams = strtoul(optarg, nullptr, 10);
+      }
       break;
     case 'w':
     case 'W': {
@@ -687,6 +718,17 @@ int main(int argc, char **argv)
 
   ssl::LibsslGlobalLock();
 
+  auto ssl_ctx = SSL_CTX_new(SSLv23_client_method());
+  if(!ssl_ctx) {
+    std::cerr << "Failed to create SSL_CTX: "
+              << ERR_error_string(ERR_get_error(), nullptr) << std::endl;
+    exit(EXIT_FAILURE);
+  }
+  SSL_CTX_set_next_proto_select_cb(ssl_ctx,
+                                   client_select_next_proto_cb, nullptr);
+
+  // First URI is treated specially.  We use scheme, host and port of
+  // this URI and ignore those in the remaining URIs if present.
   http_parser_url u;
   memset(&u, 0, sizeof(u));
   auto uri = argv[optind];
@@ -703,48 +745,71 @@ int main(int argc, char **argv)
   } else {
     config.port = util::get_default_port(uri, u);
   }
-  if(util::has_uri_field(u, UF_PATH)) {
-    config.path = util::get_uri_field(uri, u, UF_PATH);
-  } else {
-    config.path = "/";
-  }
 
-  auto ssl_ctx = SSL_CTX_new(SSLv23_client_method());
-  if(!ssl_ctx) {
-    std::cerr << "Failed to create SSL_CTX: "
-              << ERR_error_string(ERR_get_error(), nullptr) << std::endl;
+  std::vector<std::string> reqlines;
+
+  reqlines.push_back(get_reqline(uri, u));
+
+  ++optind;
+  for(int i = optind; i < argc; ++i) {
+    memset(&u, 0, sizeof(u));
+
+    auto uri = argv[i];
+
+    if(http_parser_parse_url(uri, strlen(uri), 0, &u) != 0) {
+      std::cerr << "invalid URI: " << uri << std::endl;
       exit(EXIT_FAILURE);
     }
-  SSL_CTX_set_next_proto_select_cb(ssl_ctx,
-                                   client_select_next_proto_cb, nullptr);
-  // For nghttp2
-  Headers nva;
-  nva.emplace_back(":scheme", config.scheme);
+
+    reqlines.push_back(get_reqline(uri, u));
+  }
+
+  if(config.max_concurrent_streams == -1) {
+    config.max_concurrent_streams = reqlines.size();
+  }
+
+  Headers shared_nva;
+  shared_nva.emplace_back(":scheme", config.scheme);
   if(config.port != util::get_default_port(uri, u)) {
-    nva.emplace_back(":authority",
+    shared_nva.emplace_back(":authority",
                      config.host + ":" + util::utos(config.port));
   } else {
-    nva.emplace_back(":authority", config.host);
+    shared_nva.emplace_back(":authority", config.host);
   }
-  nva.emplace_back(":path", config.path);
-  nva.emplace_back(":method", "GET");
+  shared_nva.emplace_back(":method", "GET");
+
+  for(auto& req : reqlines) {
+    // For nghttp2
+    std::vector<nghttp2_nv> nva;
 
-  for(auto& nv : nva) {
-    config.nva.push_back(http2::make_nv(nv.first, nv.second));
+    nva.push_back(http2::make_nv_ls(":path", req));
+
+    for(auto& nv : shared_nva) {
+      nva.push_back(http2::make_nv(nv.first, nv.second));
     }
 
+    config.nva.push_back(std::move(nva));
+
     // For spdylay
-  for(auto& nv : nva) {
+    std::vector<const char*> cva;
+
+    cva.push_back(":path");
+    cva.push_back(req.c_str());
+
+    for(auto& nv : shared_nva) {
       if(nv.first == ":authority") {
-      config.nv.push_back(":host");
+        cva.push_back(":host");
       } else {
-      config.nv.push_back(nv.first.c_str());
+        cva.push_back(nv.first.c_str());
+      }
+      cva.push_back(nv.second.c_str());
     }
-    config.nv.push_back(nv.second.c_str());
+    cva.push_back(":version");
+    cva.push_back("HTTP/1.1");
+    cva.push_back(nullptr);
+
+    config.nv.push_back(std::move(cva));
   }
-  config.nv.push_back(":version");
-  config.nv.push_back("HTTP/1.1");
-  config.nv.push_back(nullptr);
 
   resolve_host();
 

src/h2load.h

@@ -48,17 +48,16 @@ namespace h2load {
 class Session;
 
 struct Config {
-  std::vector<nghttp2_nv> nva;
-  std::vector<const char*> nv;
+  std::vector<std::vector<nghttp2_nv>> nva;
+  std::vector<std::vector<const char*>> nv;
   std::string scheme;
   std::string host;
-  std::string path;
   addrinfo *addrs;
   size_t nreqs;
   size_t nclients;
   size_t nthreads;
   // The maximum number of concurrent streams per session.
-  size_t max_concurrent_streams;
+  ssize_t max_concurrent_streams;
   size_t window_bits;
   size_t connection_window_bits;
   uint16_t port;
@@ -132,6 +131,7 @@ struct Client {
   SSL *ssl;
   bufferevent *bev;
   addrinfo *next_addr;
+  size_t reqidx;
   ClientState state;
 
   Client(Worker *worker);

src/h2load_http2_session.cc

@@ -141,9 +141,14 @@ void Http2Session::on_connect()
 
 void Http2Session::submit_request()
 {
-  nghttp2_submit_request(session_, 0,
-                         client_->worker->config->nva.data(),
-                         client_->worker->config->nva.size(),
+  auto config = client_->worker->config;
+  auto& nva = config->nva[client_->reqidx++];
+
+  if(client_->reqidx == config->nva.size()) {
+    client_->reqidx = 0;
+  }
+
+  nghttp2_submit_request(session_, 0, nva.data(), nva.size(),
                          nullptr, nullptr);
 }
 

src/h2load_spdy_session.cc

@@ -150,8 +150,14 @@ void SpdySession::on_connect()
 
 void SpdySession::submit_request()
 {
-  spdylay_submit_request(session_, 0, client_->worker->config->nv.data(),
-                         nullptr, nullptr);
+  auto config = client_->worker->config;
+  auto& nv = config->nv[client_->reqidx++];
+
+  if(client_->reqidx == config->nv.size()) {
+    client_->reqidx = 0;
+  }
+
+  spdylay_submit_request(session_, 0, nv.data(), nullptr, nullptr);
 }
 
 ssize_t SpdySession::on_read()