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Implement Expect: 100-continue

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This commit is contained in:
Lorenz Stechauner
2024-02-07 15:23:14 +01:00
parent e97809253a
commit 80d7626208
7 changed files with 150 additions and 62 deletions
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8
src/lib/http.c
View File

@@ -387,6 +387,14 @@ int http_send_request(sock *server, http_req *req) {
return 0;
}
int http_send_100_continue(sock *client) {
char buf[256];
char date_buf[64];
int size = sprintf(buf, "HTTP/1.1 100 Continue\r\nDate: %s\r\nServer: " SERVER_STR "\r\n\r\n",
http_get_date(date_buf, sizeof(date_buf)));
return sock_send_x(client, buf, size, 0) == -1 ? -1 : 0;
}
const http_status *http_get_status(status_code_t status_code) {
for (int i = 0; i < http_statuses_size; i++) {
if (http_statuses[i].code == status_code) {

2
src/lib/http.h
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@@ -174,6 +174,8 @@ int http_send_response(sock *client, http_res *res);
int http_send_request(sock *server, http_req *req);
int http_send_100_continue(sock *client);
const http_status *http_get_status(status_code_t status_code);
const http_status_msg *http_get_error_msg(status_code_t status_code);

153
src/lib/proxy.c
View File

@@ -440,35 +440,74 @@ int proxy_init(proxy_ctx_t **proxy_ptr, http_req *req, http_res *res, http_statu
break;
}
const char *content_length = http_get_header_field(&req->hdr, "Content-Length");
unsigned long content_len = content_length != NULL ? strtoul(content_length, NULL, 10) : 0;
const char *transfer_encoding = http_get_header_field(&req->hdr, "Transfer-Encoding");
ret = 0;
if (content_len > 0) {
ret = sock_splice(&proxy->proxy, client, buffer, sizeof(buffer), content_len);
} else if (strcontains(transfer_encoding, "chunked")) {
ret = sock_splice_chunked(&proxy->proxy, client, buffer, sizeof(buffer), SOCK_CHUNKED);
}
if (ret < 0 || (content_len != 0 && ret != content_len)) {
if (ret == -1 && errno != EPROTO) {
res->status = http_get_status(502);
ctx->origin = SERVER_REQ;
error("Unable to send request to server (2)");
sprintf(err_msg, "Unable to send request to server: %s.", error_str(errno, err_buf, sizeof(err_buf)));
return -1;
} else if (ret == -1) {
res->status = http_get_status(400);
ctx->origin = CLIENT_REQ;
error("Unable to receive request from client");
sprintf(err_msg, "Unable to receive request from client: %s.", error_str(errno, err_buf, sizeof(err_buf)));
const char *client_expect = http_get_header_field(&req->hdr, "Expect");
int expect_100_continue = (client_expect != NULL && strcasecmp(client_expect, "100-continue") == 0);
int ignore_content = 0;
if (expect_100_continue) {
http_res tmp_res = {
.version = "1.1",
.status = http_get_status(501),
};
if (http_init_hdr(&tmp_res.hdr) != 0) {
res->status = http_get_status(500);
ctx->origin = INTERNAL;
error("Unable to initialize http header");
return -1;
}
ret = proxy_peek_response(proxy, &tmp_res, ctx, custom_status, err_msg);
if (ret < 0)
return (int) ret;
if (tmp_res.status->code == 100) {
if (sock_recv_x(&proxy->proxy, buffer, ret, 0) == -1) {
res->status = http_get_status(502);
ctx->origin = SERVER_RES;
error("Unable to receive from server");
return -1;
}
if (http_send_response(client, &tmp_res) != 0) {
res->status = http_get_status(400);
ctx->origin = CLIENT_RES;
error("Unable to send to client");
return -1;
}
} else {
ignore_content = 1;
}
}
if (!ignore_content) {
const char *content_length = http_get_header_field(&req->hdr, "Content-Length");
unsigned long content_len = content_length != NULL ? strtoul(content_length, NULL, 10) : 0;
const char *transfer_encoding = http_get_header_field(&req->hdr, "Transfer-Encoding");
ret = 0;
if (content_len > 0) {
ret = sock_splice(&proxy->proxy, client, buffer, sizeof(buffer), content_len);
} else if (strcontains(transfer_encoding, "chunked")) {
ret = sock_splice_chunked(&proxy->proxy, client, buffer, sizeof(buffer), SOCK_CHUNKED);
}
if (ret < 0 || (content_len != 0 && ret != content_len)) {
if (ret == -1 && errno != EPROTO) {
res->status = http_get_status(502);
ctx->origin = SERVER_REQ;
error("Unable to send request to server (2)");
sprintf(err_msg, "Unable to send request to server: %s.", error_str(errno, err_buf, sizeof(err_buf)));
return -1;
} else if (ret == -1) {
res->status = http_get_status(400);
ctx->origin = CLIENT_REQ;
error("Unable to receive request from client");
sprintf(err_msg, "Unable to receive request from client: %s.", error_str(errno, err_buf, sizeof(err_buf)));
return -1;
}
res->status = http_get_status(500);
ctx->origin = INTERNAL;
error("Unknown Error");
return -1;
}
res->status = http_get_status(500);
ctx->origin = INTERNAL;
error("Unknown Error");
return -1;
}
if (sock_set_socket_timeout(&proxy->proxy, SERVER_SOCKET_TIMEOUT_RES) != 0) {
@@ -478,6 +517,48 @@ int proxy_init(proxy_ctx_t **proxy_ptr, http_req *req, http_res *res, http_statu
return -1;
}
while (1) {
ret = proxy_peek_response(proxy, res, ctx, custom_status, err_msg);
if (ret < 0) {
return (int) ret;
} else if (sock_recv_x(&proxy->proxy, buffer, ret, 0) == -1) {
res->status = http_get_status(502);
ctx->origin = SERVER_RES;
error("Unable to receive from server");
return -1;
}
if (res->status->code == 100) {
if (http_send_response(client, res) != 0) {
res->status = http_get_status(400);
ctx->origin = CLIENT_RES;
error("Unable to send to client");
return -1;
}
} else {
break;
}
}
long keep_alive_timeout = http_get_keep_alive_timeout(&res->hdr);
proxy->http_timeout = (keep_alive_timeout > 0) ? keep_alive_timeout * 1000000 : 0;
connection = http_get_header_field(&res->hdr, "Connection");
proxy->close = !streq(res->version, "1.1") || strcontains(connection, "close") || strcontains(connection, "Close");
ret = proxy_response_header(req, res, conf);
if (ret != 0) {
res->status = http_get_status(500);
ctx->origin = INTERNAL;
return -1;
}
return 0;
}
int proxy_peek_response(proxy_ctx_t *proxy, http_res *res, http_status_ctx *ctx, http_status *custom_status, char *err_msg) {
char buffer[CHUNK_SIZE], err_buf[256];
long ret;
ret = sock_recv(&proxy->proxy, buffer, sizeof(buffer) - 1, MSG_PEEK);
if (ret <= 0) {
int e_sys = error_get_sys(), e_ssl = error_get_ssl();
@@ -569,23 +650,7 @@ int proxy_init(proxy_ctx_t **proxy_ptr, http_req *req, http_res *res, http_statu
}
ptr = pos0 + 2;
}
if (sock_recv_x(&proxy->proxy, buffer, header_len, 0) == -1)
return -1;
long keep_alive_timeout = http_get_keep_alive_timeout(&res->hdr);
proxy->http_timeout = (keep_alive_timeout > 0) ? keep_alive_timeout * 1000000 : 0;
connection = http_get_header_field(&res->hdr, "Connection");
proxy->close = !streq(res->version, "1.1") || strcontains(connection, "close") || strcontains(connection, "Close");
ret = proxy_response_header(req, res, conf);
if (ret != 0) {
res->status = http_get_status(500);
ctx->origin = INTERNAL;
return -1;
}
return 0;
return header_len;
}
int proxy_send(proxy_ctx_t *proxy, sock *client, unsigned long len_to_send, int flags) {

2
src/lib/proxy.h
View File

@@ -43,6 +43,8 @@ int proxy_response_header(http_req *req, http_res *res, host_config_t *conf);
int proxy_init(proxy_ctx_t **proxy, http_req *req, http_res *res, http_status_ctx *ctx, host_config_t *conf, sock *client, http_status *custom_status, char *err_msg);
int proxy_peek_response(proxy_ctx_t *proxy, http_res *res, http_status_ctx *ctx, http_status *custom_status, char *err_msg);
int proxy_send(proxy_ctx_t *proxy, sock *client, unsigned long len_to_send, int flags);
int proxy_dump(proxy_ctx_t *proxy, char *buf, long len);

22
src/lib/sock.c
View File

@@ -211,15 +211,8 @@ long sock_send(sock *s, void *buf, unsigned long len, int flags) {
long ret;
if (s->enc) {
while (1) {
ret = SSL_write(s->ssl, buf, (int) len);
if (ret <= 0) {
sock_error(s, (int) ret);
if (error_get_ssl() == SSL_ERROR_WANT_WRITE)
continue;
}
break;
}
ret = SSL_write(s->ssl, buf, (int) len);
if (ret <= 0) sock_error(s, (int) ret);
} else if (s->pipe) {
if (flags & ~MSG_MORE) {
errno = EINVAL;
@@ -262,15 +255,8 @@ long sock_recv(sock *s, void *buf, unsigned long len, int flags) {
long ret;
if (s->enc) {
int (*func)(SSL *, void *, int) = (flags & MSG_PEEK) ? SSL_peek : SSL_read;
while (1) {
ret = func(s->ssl, buf, (int) len);
if (ret <= 0) {
sock_error(s, (int) ret);
if (error_get_ssl() == SSL_ERROR_WANT_READ)
continue;
}
break;
}
ret = func(s->ssl, buf, (int) len);
if (ret <= 0) sock_error(s, (int) ret);
} else if (s->pipe) {
if (flags & ~MSG_WAITALL) {
errno = EINVAL;

19
src/worker/fastcgi_handler.c
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@@ -77,13 +77,32 @@ static int fastcgi_handler_1(client_ctx_t *ctx, fastcgi_cnx_t **fcgi_cnx) {
(*fcgi_cnx) = &fcgi_cnx_buf;
fastcgi_handle_connection(ctx, fcgi_cnx);
int expect_100_continue = 0;
const char *client_expect = http_get_header_field(&req->hdr, "Expect");
if (client_expect != NULL && strcasecmp(client_expect, "100-continue") == 0) {
expect_100_continue = 1;
} else if (client_expect != NULL) {
fastcgi_close_cnx((&fcgi_cnx_buf));
res->status = http_get_status(417);
return 3;
}
const char *client_content_length = http_get_header_field(&req->hdr, "Content-Length");
const char *client_transfer_encoding = http_get_header_field(&req->hdr, "Transfer-Encoding");
if (client_content_length != NULL) {
if (expect_100_continue) {
http_send_100_continue(client);
}
unsigned long client_content_len = strtoul(client_content_length, NULL, 10);
ret = fastcgi_receive(*fcgi_cnx, client, client_content_len);
} else if (strcontains(client_transfer_encoding, "chunked")) {
if (expect_100_continue) {
http_send_100_continue(client);
}
ret = fastcgi_receive_chunked(*fcgi_cnx, client);
} else if (expect_100_continue) {
fastcgi_close_cnx((&fcgi_cnx_buf));
res->status = http_get_status(417);
return 3;
} else {
ret = 0;
}

6
src/worker/local_handler.c
View File

@@ -159,6 +159,12 @@ static int local_handler(client_ctx_t *ctx) {
return 1;
}
const char *client_expect = http_get_header_field(&req->hdr, "Expect");
if (client_expect != NULL) {
res->status = http_get_status(417);
return 0;
}
res->status = http_get_status(200);
cache_init_uri(ctx->conf->cache, uri);