void serve_file(int clientfd, const char* file_path)
{
Logger(LOG_INFO, 0, "serve file %s\n", file_path);
FILE *resource;
char buf[1024];
char filename[1024];
int numchars = 1;
int file_len = 0;
int status_code;
strcpy(filename, FILE_DIR);
strcat(filename, file_path);
resource = fopen(filename, "r");
if (resource == NULL)
{
strcpy(filename, FILE_DIR);
strcat(filename, "/notfound.html");
resource = fopen(filename, "r");
status_code = 404;
}
else
{
status_code = 200;
}
response_header(clientfd, resource, status_code);
send_file(clientfd, resource);
fclose(resource);
return ;
}
void post(char *uri, char *param, int header_count, char **headers)
{
int i;
response_header(200, "OK", 0, NULL);
printf("Request method: POST\r\n");
printf("Request URI: %s\r\n", uri);
printf("Request parameters: %s\r\n", param);
printf("Request headers: %d\r\n", header_count);
for (i = 0; i < header_count; i++)
printf("\t%s\r\n", headers[i]);
}
void http_server(void) {
char *ret;
// HTTP methodを受け取る
char method[METHOD_LEN + 1];
ret = read_until(method, METHOD_LEN + 1, " ");
// methodが正しく送られてこなければ400エラーを返す
if (ret == NULL || ret == &method[METHOD_LEN + 1]) {
response_header(400, "Bad Request", 0, NULL);
return;
}
// methodがGET，POSTでなければ501エラーを返す
if (strcmp(method, "GET") != 0 && strcmp(method, "POST") != 0) {
response_header(501, "Not Implemented", 0, NULL);
return;
}
// URIを受け取る
char uri[URI_LEN + 1];
ret = read_until(uri, URI_LEN + 1, " ");
// URIが正しく送られてこなければ414エラーを返す
if (ret == NULL || ret == &uri[URI_LEN + 1]) {
response_header(414, "Request-URI Too Long", 0, NULL);
return;
}
// HTTP versionを受け取る
char version[VERSION_LEN + 2];
ret = read_until(version, VERSION_LEN + 2, "\r\n");
// HTTP versionが正しく送られてこなければ400エラーを返す
if (ret == NULL || ret == &version[VERSION_LEN + 2]) {
response_header(400, "Bad Request", 0, NULL);
return;
}
// HTTP versionが1.1でなければ505エラーを返す
if (strcmp(version, "HTTP/1.1") != 0) {
response_header(505, "HTTP Version Not Supported", 0, NULL);
return;
}
// URIに?が含まれていれば，パラメータを抽出
char *param = strchr(uri, '?');
if (param == NULL)
param = &uri[strlen(uri)];
else
*(param++) = '\0';
int status = 0, header_count = 0;
char header[HEADER_LEN + 2], **headers = NULL;
while (1) {
// HTTP headerを受け取る
ret = read_until(header, HEADER_LEN + 2, "\r\n");
// HTTP headerが正しく送られてこなければ400エラーを返す
if (ret == NULL || ret == &header[HEADER_LEN + 2]) {
status = 400;
break;
}
// 長さが0であればヘッダーの終端
if (strlen(header) == 0)
break;
// ヘッダーに:が含まれていなければ400エラーを返す
char *delimiter = strchr(header, ':');
if (delimiter == NULL) {
status = 400;
return;
}
// headersをreallocする
char **ret_s = (char **)realloc(headers, sizeof(char *) * (header_count + 1));
if (ret_s == NULL) {
perror("realloc() failed");
status = 500;
break;
} else {
headers = ret_s;
header_count++;
}
// headersの最後の要素にheaderをコピーするための領域を確保する
ret = (char *)malloc(sizeof(char) * (strlen(header) + 1));
if (ret == NULL) {
perror("realloc() failed");
status = 500;
break;
} else {
headers[header_count - 1] = ret;
}
// headerをコピーする
ret = strcpy(headers[header_count - 1], header);
}
// エラーがなければmethodに応じで関数を呼ぶ
if (status == 0) {
if (strcmp(method, "GET") == 0)
get(uri, param, header_count, headers);
else if (strcmp(method, "POST") == 0)
post(uri, param, header_count, headers);
} else if (status == 400) {
response_header(400, "Bad Request", 0, NULL);
} else if (status == 500) {
response_header(500, "Internal Server Error", 0, NULL);
}
// 確保した領域を解放
int i = 0;
for(i = 0; i < header_count; i++)
free(headers[i]);
free(headers);
return;
}
HIDDEN int ws_start_channel(struct transaction_t *txn, const char *protocol,
int (*data_cb)(struct buf *inbuf, struct buf *outbuf,
struct buf *logbuf, void **rock))
{
int r;
const char **hdr, *accept = NULL;
wslay_event_context_ptr ev;
struct ws_context *ctx;
struct wslay_event_callbacks callbacks = {
recv_cb,
send_cb,
NULL,
NULL,
NULL,
NULL,
on_msg_recv_cb
};
/* Check for supported WebSocket version */
hdr = spool_getheader(txn->req_hdrs, "Sec-WebSocket-Version");
if (!hdr) {
txn->error.desc = "Missing WebSocket version";
return HTTP_BAD_REQUEST;
}
else if (hdr[1]) {
txn->error.desc = "Multiple WebSocket versions";
return HTTP_BAD_REQUEST;
}
else if (strcmp(hdr[0], WS_VERSION)) {
txn->error.desc = "Unsupported WebSocket version";
return HTTP_UPGRADE;
}
if (protocol) {
/* Check for supported WebSocket subprotocol */
int i, found = 0;
hdr = spool_getheader(txn->req_hdrs, "Sec-WebSocket-Protocol");
if (!hdr) {
txn->error.desc = "Missing WebSocket protocol";
return HTTP_BAD_REQUEST;
}
for (i = 0; !found && hdr[i]; i++) {
tok_t tok = TOK_INITIALIZER(hdr[i], ",", TOK_TRIMLEFT|TOK_TRIMRIGHT);
char *token;
while ((token = tok_next(&tok))) {
if (!strcmp(token, protocol)) {
found = 1;
break;
}
}
tok_fini(&tok);
}
if (!found) {
txn->error.desc = "Unsupported WebSocket protocol";
return HTTP_BAD_REQUEST;
}
}
if (txn->flags.ver == VER_1_1) {
unsigned char sha1buf[SHA1_DIGEST_LENGTH];
/* Check for WebSocket client key */
hdr = spool_getheader(txn->req_hdrs, "Sec-WebSocket-Key");
if (!hdr) {
txn->error.desc = "Missing WebSocket client key";
return HTTP_BAD_REQUEST;
}
else if (hdr[1]) {
txn->error.desc = "Multiple WebSocket client keys";
return HTTP_BAD_REQUEST;
}
else if (strlen(hdr[0]) != WS_CKEY_LEN) {
txn->error.desc = "Invalid WebSocket client key";
return HTTP_BAD_REQUEST;
}
/* Create WebSocket accept key */
buf_setcstr(&txn->buf, hdr[0]);
buf_appendcstr(&txn->buf, WS_GUID);
xsha1((u_char *) buf_base(&txn->buf), buf_len(&txn->buf), sha1buf);
buf_ensure(&txn->buf, WS_AKEY_LEN+1);
accept = buf_base(&txn->buf);
r = sasl_encode64((char *) sha1buf, SHA1_DIGEST_LENGTH,
(char *) accept, WS_AKEY_LEN+1, NULL);
if (r != SASL_OK) syslog(LOG_WARNING, "sasl_encode64: %d", r);
}
/* Create server context */
r = wslay_event_context_server_init(&ev, &callbacks, txn);
if (r) {
syslog(LOG_WARNING,
"wslay_event_context_init: %s", wslay_strerror(r));
return HTTP_SERVER_ERROR;
}
/* Create channel context */
ctx = xzmalloc(sizeof(struct ws_context));
ctx->event = ev;
ctx->accept = accept;
ctx->protocol = protocol;
ctx->data_cb = data_cb;
txn->ws_ctx = ctx;
/* Check for supported WebSocket extensions */
parse_extensions(txn);
/* Prepare log buffer */
/* Add client data */
buf_printf(&ctx->log, "%s", txn->conn->clienthost);
if (httpd_userid) buf_printf(&ctx->log, " as \"%s\"", httpd_userid);
if ((hdr = spool_getheader(txn->req_hdrs, "User-Agent"))) {
buf_printf(&ctx->log, " with \"%s\"", hdr[0]);
if ((hdr = spool_getheader(txn->req_hdrs, "X-Client")))
buf_printf(&ctx->log, " by \"%s\"", hdr[0]);
else if ((hdr = spool_getheader(txn->req_hdrs, "X-Requested-With")))
buf_printf(&ctx->log, " by \"%s\"", hdr[0]);
}
/* Add request-line */
buf_printf(&ctx->log, "; \"WebSocket/%s via %s\"",
protocol ? protocol : "echo" , txn->req_line.ver);
ctx->log_tail = buf_len(&ctx->log);
/* Tell client that WebSocket negotiation has succeeded */
if (txn->conn->sess_ctx) {
/* Treat WS data as chunked response */
txn->flags.te = TE_CHUNKED;
response_header(HTTP_OK, txn);
/* Force the response to the client immediately */
prot_flush(httpd_out);
}
else response_header(HTTP_SWITCH_PROT, txn);
/* Set connection as non-blocking */
prot_NONBLOCK(txn->conn->pin);
/* Don't do telemetry logging in prot layer */
prot_setlog(txn->conn->pin, PROT_NO_FD);
prot_setlog(txn->conn->pout, PROT_NO_FD);
return 0;
}
