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

net/tools/quic/quic_simple_client_bin.cc

Index: net/tools/quic/quic_simple_client_bin.cc
diff --git a/net/tools/quic/quic_simple_client_bin.cc b/net/tools/quic/quic_simple_client_bin.cc
index 908da90c297cd235fe25fd925cda303778c2c9ce..1667e0937add72b41d25abfd5afbbe92781d0c5e 100644
--- a/net/tools/quic/quic_simple_client_bin.cc
+++ b/net/tools/quic/quic_simple_client_bin.cc
@@ -134,6 +134,22 @@ static bool DecodeHexString(const base::StringPiece& hex, std::string* bytes) {
   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();
@@ -338,16 +354,28 @@ int main(int argc, char *argv[]) {
   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;
+    }
   }
 
   size_t response_code = client.latest_response_code();