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Merge pull request #25 from donpillou/errorHandling

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send/recv error handling, avoid in-code #ifdefs, update README with build instructions
This commit is contained in:
David Baird
2013-12-31 05:24:34 -08:00
parent 80d5c25872 c5917f913e
commit 1598331652
2 changed files with 40 additions and 43 deletions
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README.md
+6 -2
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@@ -91,11 +91,15 @@ Example
node example-server.js
# Build and launch the client:
g++ example-client.cpp -o example-client
g++ -c easywsclient.cpp -o easywsclient.o
g++ -c example-client.cpp -o example-client.o
g++ example-client.o easywsclient.o -o example-client
./example-client
# ...or build and launch a C++11 client:
g++ -std=gnu++0x example-client-cpp11.cpp -o example-client-cpp11
g++ -std=gnu++0x -c easywsclient.cpp -o easywsclient.o
g++ -std=gnu++0x -c example-client-cpp11.cpp -o example-client-cpp11.o
g++ example-client-cpp11.o easywsclient.o -o example-client-cpp11
./example-client-cpp11
# Expect the output from example-client:
easywsclient.cpp
+34 -41
View File
@@ -1,11 +1,8 @@
#ifdef _MSC_VER
// _CRT_SECURE_NO_WARNINGS for sscanf errors in MSVC2013 Express
#define _CRT_SECURE_NO_WARNINGS
#endif
#include "easywsclient.hpp"
#ifdef _WIN32
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS // _CRT_SECURE_NO_WARNINGS for sscanf errors in MSVC2013 Express
#endif
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
@@ -40,6 +37,9 @@
typedef __int64 int64_t;
typedef unsigned __int64 uint64_t;
#endif
#define socketerrno WSAGetLastError()
#define SOCKET_EAGAIN_EINPROGRESS WSAEINPROGRESS
#define SOCKET_EWOULDBLOCK WSAEWOULDBLOCK
#else
#include <fcntl.h>
#include <netdb.h>
@@ -62,11 +62,18 @@
#ifndef SOCKET_ERROR
#define SOCKET_ERROR (-1)
#endif
#define closesocket(s) ::close(s)
#include <errno.h>
#define socketerrno errno
#define SOCKET_EAGAIN_EINPROGRESS EAGAIN
#define SOCKET_EWOULDBLOCK EWOULDBLOCK
#endif
#include <vector>
#include <string>
#include "easywsclient.hpp"
namespace { // private module-only namespace
socket_t hostname_connect(const std::string& hostname, int port) {
@@ -92,11 +99,7 @@ socket_t hostname_connect(const std::string& hostname, int port) {
if (connect(sockfd, p->ai_addr, p->ai_addrlen) != SOCKET_ERROR) {
break;
}
#ifdef _WIN32
closesocket(sockfd);
#else
close(sockfd);
#endif
sockfd = INVALID_SOCKET;
}
freeaddrinfo(result);
@@ -156,14 +159,6 @@ class _RealWebSocket : public easywsclient::WebSocket
uint8_t masking_key[4];
};
inline int close(socket_t sockfd) {
#ifdef _WIN32
return ::closesocket(sockfd);
#else
return ::close(sockfd);
#endif
}
std::vector<uint8_t> rxbuf;
std::vector<uint8_t> txbuf;
@@ -194,32 +189,24 @@ class _RealWebSocket : public easywsclient::WebSocket
FD_ZERO(&wfds);
FD_SET(sockfd, &rfds);
if (txbuf.size()) { FD_SET(sockfd, &wfds); }
#ifdef _WIN32
select(0, &rfds, &wfds, NULL, &tv);
#else
select(sockfd + 1, &rfds, &wfds, NULL, &tv);
#endif
}
while (true) {
// FD_ISSET(0, &rfds) will be true
int N = rxbuf.size();
ssize_t ret;
rxbuf.resize(N + 1500);
#ifdef _WIN32
ret = recv(sockfd, (char*)&rxbuf[0] + N, 1500, 0);
#else
ret = recv(sockfd, &rxbuf[0] + N, 1500, 0);
#endif
if (false) { }
else if (ret < 0) {
else if (ret < 0 && (socketerrno == SOCKET_EWOULDBLOCK || socketerrno == SOCKET_EAGAIN_EINPROGRESS)) {
rxbuf.resize(N);
break;
}
else if (ret == 0) {
else if (ret <= 0) {
rxbuf.resize(N);
close(sockfd);
closesocket(sockfd);
readyState = CLOSED;
fprintf(stderr, "Connection closed!\n");
fputs(ret < 0 ? "Connection error!\n" : "Connection closed!\n", stderr);
break;
}
else {
@@ -227,17 +214,23 @@ class _RealWebSocket : public easywsclient::WebSocket
}
}
while (txbuf.size()) {
int ret;
#ifdef _WIN32
ret = ::send(sockfd, (char*)&txbuf[0], txbuf.size(), 0);
#else
ret = ::send(sockfd, &txbuf[0], txbuf.size(), 0);
#endif
if (ret > 0) { txbuf.erase(txbuf.begin(), txbuf.begin() + ret); }
else { break; }
int ret = ::send(sockfd, (char*)&txbuf[0], txbuf.size(), 0);
if (false) { } // ??
else if (ret < 0 && (socketerrno == SOCKET_EWOULDBLOCK || socketerrno == SOCKET_EAGAIN_EINPROGRESS)) {
break;
}
else if (ret <= 0) {
closesocket(sockfd);
readyState = CLOSED;
fputs(ret < 0 ? "Connection error!\n" : "Connection closed!\n", stderr);
break;
}
else {
txbuf.erase(txbuf.begin(), txbuf.begin() + ret);
}
}
if (!txbuf.size() && readyState == CLOSING) {
close(sockfd);
closesocket(sockfd);
readyState = CLOSED;
}
}
@@ -300,7 +293,7 @@ class _RealWebSocket : public easywsclient::WebSocket
if (false) { }
else if (ws.opcode == wsheader_type::TEXT_FRAME && ws.fin) {
if (ws.mask) { for (size_t i = 0; i != ws.N; ++i) { rxbuf[i+ws.header_size] ^= ws.masking_key[i&0x3]; } }
std::string data(rxbuf.begin()+ws.header_size, rxbuf.begin()+ws.header_size+ws.N);
std::string data(rxbuf.begin()+ws.header_size, rxbuf.begin()+ws.header_size+(size_t)ws.N);
callable((const std::string) data);
}
else if (ws.opcode == wsheader_type::PING) { }
@@ -308,7 +301,7 @@ class _RealWebSocket : public easywsclient::WebSocket
else if (ws.opcode == wsheader_type::CLOSE) { close(); }
else { fprintf(stderr, "ERROR: Got unexpected WebSocket message.\n"); close(); }
rxbuf.erase(rxbuf.begin(), rxbuf.begin() + ws.header_size+ws.N);
rxbuf.erase(rxbuf.begin(), rxbuf.begin() + ws.header_size+(size_t)ws.N);
}
}