fix: handle plain HTTP on sslWriteAll

src/proxy/tinymitm/proxy.cpp

@@ -108,26 +108,45 @@ bool sslWriteAll(WOLFSSL* ssl, const void* data, int len, SOCKET s)
     int sent = 0;
     while (sent < len)
     {
-        int ret = wolfSSL_write(ssl, (const char*)data + sent, len - sent);
-        if (ret > 0)
+        int ret;
+        if (ssl)
+        {
+            ret = wolfSSL_write(ssl, (const char*)data + sent, len - sent);
+            if (ret <= 0)
             {
-            sent += ret;
-            continue;
-        }
-
                 int err = wolfSSL_get_error(ssl, ret);
                 if (err == WOLFSSL_ERROR_WANT_READ || err == WOLFSSL_ERROR_WANT_WRITE)
                 {
                     fd_set fds;
                     FD_ZERO(&fds);
                     FD_SET(s, &fds);
-            struct timeval tv{0, 10000}; // 10ms wait
+                    struct timeval tv{0, 10000};
                     select(0, (err == WOLFSSL_ERROR_WANT_READ) ? &fds : nullptr,
                            (err == WOLFSSL_ERROR_WANT_WRITE) ? &fds : nullptr, nullptr, &tv);
                     continue;
                 }
                 return false;
             }
+        }
+        else
+        {
+            ret = ::send(s, (const char*)data + sent, len - sent, 0);
+            if (ret <= 0)
+            {
+#ifdef _WIN32
+                if (ret < 0 && WSAGetLastError() == WSAEWOULDBLOCK)
+#else
+                if (ret < 0 && (errno == EWOULDBLOCK || errno == EAGAIN))
+#endif
+                {
+                    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+                    continue;
+                }
+                return false;
+            }
+        }
+        sent += ret;
+    }
     return true;
 }