Add libhv and test http client

vendor/libhv/include/hv/wsdef.h

@@ -0,0 +1,85 @@
+#ifndef HV_WS_DEF_H_
+#define HV_WS_DEF_H_
+
+#include "hexport.h"
+
+#include <stdbool.h>
+#include <stdlib.h> // import rand
+
+#define SEC_WEBSOCKET_VERSION       "Sec-WebSocket-Version"
+#define SEC_WEBSOCKET_KEY           "Sec-WebSocket-Key"
+#define SEC_WEBSOCKET_ACCEPT        "Sec-WebSocket-Accept"
+#define SEC_WEBSOCKET_PROTOCOL      "Sec-WebSocket-Protocol"
+#define SEC_WEBSOCKET_EXTENSIONS    "Sec-WebSocket-Extensions"
+
+#define WS_SERVER_MIN_FRAME_SIZE    2
+// 1000 1001 0000 0000
+#define WS_SERVER_PING_FRAME        "\211\0"
+// 1000 1010 0000 0000
+#define WS_SERVER_PONG_FRAME        "\212\0"
+
+#define WS_CLIENT_MIN_FRAME_SIZE    6
+// 1000 1001 1000 0000
+#define WS_CLIENT_PING_FRAME        "\211\200WSWS"
+// 1000 1010 1000 0000
+#define WS_CLIENT_PONG_FRAME        "\212\200WSWS"
+
+enum ws_session_type {
+    WS_CLIENT,
+    WS_SERVER,
+};
+
+enum ws_opcode {
+    WS_OPCODE_CONTINUE = 0x0,
+    WS_OPCODE_TEXT     = 0x1,
+    WS_OPCODE_BINARY   = 0x2,
+    WS_OPCODE_CLOSE    = 0x8,
+    WS_OPCODE_PING     = 0x9,
+    WS_OPCODE_PONG     = 0xA,
+};
+
+BEGIN_EXTERN_C
+
+// Sec-WebSocket-Key => Sec-WebSocket-Accept
+HV_EXPORT void ws_encode_key(const char* key, char accept[]);
+
+// fix-header[2] + var-length[2/8] + mask[4] + data[data_len]
+HV_EXPORT int ws_calc_frame_size(int data_len, bool has_mask DEFAULT(false));
+
+HV_EXPORT int ws_build_frame(
+    char* out,
+    const char* data,
+    int data_len,
+    const char mask[4],
+    bool has_mask DEFAULT(false),
+    enum ws_opcode opcode DEFAULT(WS_OPCODE_TEXT),
+    bool fin DEFAULT(true));
+
+HV_INLINE int ws_client_build_frame(
+    char* out,
+    const char* data,
+    int data_len,
+    /* const char mask[4] */
+    /* bool has_mask = true */
+    enum ws_opcode opcode DEFAULT(WS_OPCODE_TEXT),
+    bool fin DEFAULT(true)) {
+    char mask[4];
+    *(int*)mask = rand();
+    return ws_build_frame(out, data, data_len, mask, true, opcode, fin);
+}
+
+HV_INLINE int ws_server_build_frame(
+    char* out,
+    const char* data,
+    int data_len,
+    /* const char mask[4] */
+    /* bool has_mask = false */
+    enum ws_opcode opcode DEFAULT(WS_OPCODE_TEXT),
+    bool fin DEFAULT(true)) {
+    char mask[4] = {0};
+    return ws_build_frame(out, data, data_len, mask, false, opcode, fin);
+}
+
+END_EXTERN_C
+
+#endif // HV_WS_DEF_H_