/// <summary>
/// Reads a single message from the protocol buffer. First reads in any headers until a blank
/// line is received. Then reads in the body of the message. The headers must include a Content-Length
/// header specifying the length of the body.
/// </summary>
private static async Task <string> ReadPacket(ProtocolReader reader)
{
Dictionary <string, string> headers = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
string line;
while ((line = await reader.ReadHeaderLineAsync().ConfigureAwait(false)) != null)
{
if (String.IsNullOrEmpty(line))
{
// end of headers for this request...
break;
}
var split = line.Split(_headerSeparator, 2);
if (split.Length != 2)
{
// Probably getting an error message, so read all available text
var error = line;
try {
// Encoding is uncertain since this is malformed
error += Encoding.UTF8.GetString(await reader.ReadToEndAsync());
} catch (ArgumentException) {
}
throw new InvalidDataException("Malformed header, expected 'name: value'" + Environment.NewLine + error);
}
headers[split[0]] = split[1];
}
if (line == null)
{
return(null);
}
string contentLengthStr;
int contentLength;
if (!headers.TryGetValue(Headers.ContentLength, out contentLengthStr))
{
throw new InvalidDataException("Content-Length not specified on request");
}
if (!Int32.TryParse(contentLengthStr, out contentLength) || contentLength < 0)
{
throw new InvalidDataException("Invalid Content-Length: " + contentLengthStr);
}
var contentBinary = await reader.ReadContentAsync(contentLength);
if (contentBinary.Length != contentLength)
{
throw new InvalidDataException(string.Format("Content length does not match Content-Length header. Expected {0} bytes but read {1} bytes.", contentLength, contentBinary.Length));
}
try {
var text = Encoding.UTF8.GetString(contentBinary);
return(text);
} catch (ArgumentException ex) {
throw new InvalidDataException("Content is not valid UTF-8.", ex);
}
}
/// <summary>
/// Reads a single message from the protocol buffer. First reads in any headers until a blank
/// line is received. Then reads in the body of the message. The headers must include a Content-Length
/// header specifying the length of the body.
/// </summary>
private static async Task <string> ReadPacket(ProtocolReader reader)
{
var headers = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
var lines = new List <string>();
string line;
while ((line = await reader.ReadHeaderLineAsync().ConfigureAwait(false)) != null)
{
lines.Add(line ?? "(null)");
if (String.IsNullOrEmpty(line))
{
if (headers.Count == 0)
{
continue;
}
// end of headers for this request...
break;
}
var split = line.Split(_headerSeparator, 2);
if (split.Length != 2)
{
// Probably getting an error message, so read all available text
var error = line;
try {
// Encoding is uncertain since this is malformed
error += TextEncoding.GetString(await reader.ReadToEndAsync());
} catch (ArgumentException) {
}
throw new InvalidDataException("Malformed header, expected 'name: value'" + Environment.NewLine + error);
}
headers[split[0]] = split[1];
}
if (line == null)
{
return(null);
}
string contentLengthStr;
int contentLength;
if (!headers.TryGetValue(Headers.ContentLength, out contentLengthStr))
{
// HACK: Attempting to find problem with message content
Console.Error.WriteLine("Content-Length not specified on request. Lines follow:");
foreach (var l in lines)
{
Console.Error.WriteLine($"> {l}");
}
Console.Error.Flush();
throw new InvalidDataException("Content-Length not specified on request");
}
if (!Int32.TryParse(contentLengthStr, out contentLength) || contentLength < 0)
{
throw new InvalidDataException("Invalid Content-Length: " + contentLengthStr);
}
var contentBinary = await reader.ReadContentAsync(contentLength);
if (contentBinary.Length == 0 && contentLength > 0)
{
// The stream was closed, so let's abort safely
return(null);
}
if (contentBinary.Length != contentLength)
{
throw new InvalidDataException(string.Format("Content length does not match Content-Length header. Expected {0} bytes but read {1} bytes.", contentLength, contentBinary.Length));
}
try {
var text = TextEncoding.GetString(contentBinary);
return(text);
} catch (ArgumentException ex) {
throw new InvalidDataException("Content is not valid UTF-8.", ex);
}
}
