If the user supplied a request body in hex, print response body in hex as well. In addition, conver…

net/tools/quic/quic_client_bin.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // A binary wrapper for QuicClient.
 // Connects to a host using QUIC, sends a request to the provided URL, and
 // displays the response.
 //
 // Some usage examples:
 //
@@ skipping 116 matching lines @@
   if (hex.empty())
     return true;
   std::vector<uint8> v;
   if (!base::HexStringToBytes(hex.as_string(), &v))
     return false;
   if (!v.empty())
     bytes->assign(reinterpret_cast<const char*>(&v[0]), v.size());
   return true;
 };
 
+// Converts binary data into an ASCII string. Each character in the resulting
+// string is preceeded by a space, and replaced with a '.' if not printable.
+string BinaryToAscii(const string& binary) {
+  string out = "";
+  for (const unsigned char c : binary) {
+    // Leading space.
+    out += " ";
+    if (isprint(c)) {
+      out += c;
+    } else {
+      out += '.';
+    }
+  }
+  return out;
+}
+
 int main(int argc, char *argv[]) {
   base::CommandLine::Init(argc, argv);
   base::CommandLine* line = base::CommandLine::ForCurrentProcess();
   const base::CommandLine::StringVector& urls = line->GetArgs();
 
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
   CHECK(logging::InitLogging(settings));
 
   FLAGS_quic_supports_trailers = true;
@@ skipping 182 matching lines @@
 
   // Send the request.
   net::SpdyHeaderBlock header_block =
       net::tools::SpdyBalsaUtils::RequestHeadersToSpdyHeaders(headers);
   client.SendRequestAndWaitForResponse(headers, body, /*fin=*/true);
 
   // Print request and response details.
   if (!FLAGS_quiet) {
     cout << "Request:" << endl;
     cout << "headers:" << header_block.DebugString();
-    string body_to_print = body;
     if (!FLAGS_body_hex.empty()) {
       // Print the user provided hex, rather than binary body.
-      body_to_print = base::StringPrintf("(hex) 0x%s", FLAGS_body_hex.c_str());
+      cout << "body hex:   " << FLAGS_body_hex << endl;
+      string bytes;
+      DecodeHexString(FLAGS_body_hex, &bytes);
+      cout << "body ascii: " << BinaryToAscii(bytes) << endl;
+    } else {
+      cout << "body: " << body << endl;
     }
-    cout << "body: " << body_to_print << endl;
     cout << endl;
     cout << "Response:" << endl;
     cout << "headers: " << client.latest_response_headers() << endl;
-    cout << "body: " << client.latest_response_body() << endl;
+    string response_body = client.latest_response_body();
+    if (!FLAGS_body_hex.empty()) {
+      // Assume response is binary data.
+      string bytes;
+      DecodeHexString(response_body, &bytes);
+      cout << "body hex:   " << bytes << endl;
+      cout << "body ascii: " << BinaryToAscii(response_body) << endl;
+    } else {
+      cout << "body: " << response_body << endl;
+    }
     cout << "trailers: " << client.latest_response_trailers() << endl;
   }
 
   size_t response_code = client.latest_response_code();
   if (response_code >= 200 && response_code < 300) {
     cout << "Request succeeded (" << response_code << ")." << endl;
     return 0;
   } else if (response_code >= 300 && response_code < 400) {
     if (FLAGS_redirect_is_success) {
       cout << "Request succeeded (redirect " << response_code << ")." << endl;
       return 0;
     } else {
       cout << "Request failed (redirect " << response_code << ")." << endl;
       return 1;
     }
   } else {
     cerr << "Request failed (" << response_code << ")." << endl;
     return 1;
   }
 }