--- /dev/null
+#include <stdio.h>
+#include <ctype.h>
+#include <unistd.h>
+
+#include <libubox/ustream.h>
+#include <libubox/ustream-ssl.h>
+#include <libubox/usock.h>
+#include <libubox/blobmsg.h>
+
+#include "uclient.h"
+#include "uclient-utils.h"
+#include "uclient-backend.h"
+
+static struct ustream_ssl_ctx *ssl_ctx;
+
+enum request_type {
+ REQ_GET,
+ REQ_HEAD,
+ REQ_POST,
+ __REQ_MAX
+};
+
+enum http_state {
+ HTTP_STATE_INIT,
+ HTTP_STATE_HEADERS_SENT,
+ HTTP_STATE_REQUEST_DONE,
+ HTTP_STATE_RECV_HEADERS,
+ HTTP_STATE_RECV_DATA,
+ HTTP_STATE_ERROR,
+};
+
+static const char * const request_types[__REQ_MAX] = {
+ [REQ_GET] = "GET",
+ [REQ_HEAD] = "HEAD",
+ [REQ_POST] = "POST",
+};
+
+struct uclient_http {
+ struct uclient uc;
+
+ struct ustream *us;
+
+ struct ustream_fd ufd;
+ struct ustream_ssl ussl;
+
+ bool ssl;
+ enum request_type req_type;
+ enum http_state state;
+
+ unsigned int send_len;
+
+ struct blob_buf headers;
+ struct blob_buf meta;
+};
+
+enum {
+ PREFIX_HTTP,
+ PREFIX_HTTPS,
+ __PREFIX_MAX,
+};
+
+static const char * const uclient_http_prefix[] = {
+ [PREFIX_HTTP] = "http://",
+ [PREFIX_HTTPS] = "https://",
+ [__PREFIX_MAX] = NULL
+};
+
+static int uclient_do_connect(struct uclient_http *uh, const char *port)
+{
+ int fd;
+
+ if (uh->uc.url->port)
+ port = uh->uc.url->port;
+
+ fd = usock(USOCK_TCP | USOCK_NONBLOCK, uh->uc.url->host, port);
+ if (fd < 0)
+ return -1;
+
+ ustream_fd_init(&uh->ufd, fd);
+ return 0;
+}
+
+static void uclient_notify_eof(struct uclient_http *uh)
+{
+ struct ustream *us = uh->us;
+
+ if (!us->eof && !us->write_error)
+ return;
+
+ if (ustream_pending_data(us, false))
+ return;
+
+ uclient_backend_set_eof(&uh->uc);
+}
+
+static void uclient_parse_http_line(struct uclient_http *uh, char *data)
+{
+ char *name;
+ char *sep;
+
+ if (uh->state == HTTP_STATE_REQUEST_DONE) {
+ uh->state = HTTP_STATE_RECV_HEADERS;
+ return;
+ }
+
+ if (!*data) {
+ uh->state = HTTP_STATE_RECV_DATA;
+ uh->uc.meta = uh->meta.head;
+ if (uh->uc.cb->header_done)
+ uh->uc.cb->header_done(&uh->uc);
+ return;
+ }
+
+ sep = strchr(data, ':');
+ if (!sep)
+ return;
+
+ *(sep++) = 0;
+
+ for (name = data; *name; name++)
+ *name = tolower(*name);
+
+ name = data;
+ while (isspace(*sep))
+ sep++;
+
+ blobmsg_add_string(&uh->meta, name, sep);
+}
+
+static void __uclient_notify_read(struct uclient_http *uh)
+{
+ struct uclient *uc = &uh->uc;
+ char *data;
+ int len;
+
+ if (uh->state < HTTP_STATE_REQUEST_DONE)
+ return;
+
+ data = ustream_get_read_buf(uh->us, &len);
+ if (!data || !len)
+ return;
+
+ if (uh->state < HTTP_STATE_RECV_DATA) {
+ char *sep;
+ int cur_len;
+
+ do {
+ sep = strstr(data, "\r\n");
+ if (!sep)
+ break;
+
+ /* Check for multi-line HTTP headers */
+ if (sep > data) {
+ if (!sep[2])
+ return;
+
+ if (isspace(sep[2]) && sep[2] != '\r') {
+ sep[0] = ' ';
+ sep[1] = ' ';
+ continue;
+ }
+ }
+
+ *sep = 0;
+ cur_len = sep + 2 - data;
+ uclient_parse_http_line(uh, data);
+ ustream_consume(uh->us, cur_len);
+ len -= cur_len;
+
+ data = ustream_get_read_buf(uh->us, &len);
+ } while (uh->state < HTTP_STATE_RECV_DATA);
+
+ if (!len)
+ return;
+ }
+
+ if (uh->state == HTTP_STATE_RECV_DATA && uc->cb->data_read)
+ uc->cb->data_read(uc);
+}
+
+static void uclient_notify_read(struct ustream *us, int bytes)
+{
+ struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
+
+ __uclient_notify_read(uh);
+}
+
+static void uclient_notify_state(struct ustream *us)
+{
+ struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
+
+ uclient_notify_eof(uh);
+}
+
+static int uclient_setup_http(struct uclient_http *uh)
+{
+ struct ustream *us = &uh->ufd.stream;
+ int ret;
+
+ uh->us = us;
+ us->string_data = true;
+ us->notify_state = uclient_notify_state;
+ us->notify_read = uclient_notify_read;
+
+ ret = uclient_do_connect(uh, "80");
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void uclient_ssl_notify_read(struct ustream *us, int bytes)
+{
+ struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
+
+ __uclient_notify_read(uh);
+}
+
+static void uclient_ssl_notify_state(struct ustream *us)
+{
+ struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
+
+ uclient_notify_eof(uh);
+}
+
+static int uclient_setup_https(struct uclient_http *uh)
+{
+ struct ustream *us = &uh->ussl.stream;
+ int ret;
+
+ uh->ssl = true;
+ uh->us = us;
+
+ ret = uclient_do_connect(uh, "443");
+ if (ret)
+ return ret;
+
+ if (!ssl_ctx)
+ ssl_ctx = ustream_ssl_context_new(false);
+
+ us->string_data = true;
+ us->notify_state = uclient_ssl_notify_state;
+ us->notify_read = uclient_ssl_notify_read;
+ ustream_ssl_init(&uh->ussl, &uh->ufd.stream, ssl_ctx, false);
+
+ return 0;
+}
+
+static void uclient_http_disconnect(struct uclient_http *uh)
+{
+ uclient_backend_reset_state(&uh->uc);
+
+ if (!uh->us)
+ return;
+
+ if (uh->ssl)
+ ustream_free(&uh->ussl.stream);
+ ustream_free(&uh->ufd.stream);
+ close(uh->ufd.fd.fd);
+ uh->us = NULL;
+}
+
+static int uclient_http_connect(struct uclient *cl)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+
+ uclient_http_disconnect(uh);
+ blob_buf_init(&uh->meta, 0);
+
+ uh->ssl = cl->url->prefix == PREFIX_HTTPS;
+ uh->state = HTTP_STATE_INIT;
+
+ if (uh->ssl)
+ return uclient_setup_https(uh);
+ else
+ return uclient_setup_http(uh);
+}
+
+static struct uclient *uclient_http_alloc(void)
+{
+ struct uclient_http *uh;
+
+ uh = calloc_a(sizeof(*uh));
+ blob_buf_init(&uh->headers, 0);
+
+ return &uh->uc;
+}
+
+static void uclient_http_free(struct uclient *cl)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+
+ uclient_http_disconnect(uh);
+ blob_buf_free(&uh->headers);
+ blob_buf_free(&uh->meta);
+ free(uh);
+}
+
+int
+uclient_http_set_request_type(struct uclient *cl, const char *type)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+ int i;
+
+ if (cl->backend != &uclient_backend_http)
+ return -1;
+
+ if (uh->state > HTTP_STATE_INIT)
+ return -1;
+
+ for (i = 0; i < ARRAY_SIZE(request_types); i++) {
+ if (strcmp(request_types[i], type) != 0)
+ continue;
+
+ uh->req_type = i;
+ return 0;
+ }
+
+ return -1;
+}
+
+int
+uclient_http_reset_headers(struct uclient *cl, const char *name, const char *value)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+
+ blob_buf_init(&uh->headers, 0);
+
+ return 0;
+}
+
+int
+uclient_http_set_header(struct uclient *cl, const char *name, const char *value)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+
+ if (cl->backend != &uclient_backend_http)
+ return -1;
+
+ if (uh->state > HTTP_STATE_INIT)
+ return -1;
+
+ blobmsg_add_string(&uh->headers, name, value);
+ return 0;
+}
+
+#define ustream_printf(us, ...) do { \
+ fprintf(stderr, "send: " __VA_ARGS__); \
+ ustream_printf(us, __VA_ARGS__); \
+} while (0)
+
+
+static void
+uclient_http_send_headers(struct uclient_http *uh)
+{
+ struct uclient_url *url = uh->uc.url;
+ struct blob_attr *cur;
+ int rem;
+
+ if (uh->state >= HTTP_STATE_HEADERS_SENT)
+ return;
+
+ ustream_printf(uh->us,
+ "%s /%s HTTP/1.0\r\n"
+ "Host: %s\r\n",
+ request_types[uh->req_type],
+ url->location, url->host);
+
+ blobmsg_for_each_attr(cur, uh->headers.head, rem)
+ ustream_printf(uh->us, "%s: %s\n", blobmsg_name(cur), (char *) blobmsg_data(cur));
+
+ if (url->auth) {
+ int auth_len = strlen(url->auth);
+ char *auth_buf;
+
+ if (auth_len > 512)
+ return;
+
+ auth_buf = alloca(base64_len(auth_len) + 1);
+ base64_encode(url->auth, auth_len, auth_buf);
+ ustream_printf(uh->us, "Authorization: Basic %s\r\n", auth_buf);
+ }
+
+ if (uh->send_len > 0)
+ ustream_printf(uh->us, "Content-Length: %d", uh->send_len);
+
+ ustream_printf(uh->us, "\r\n");
+}
+
+static int
+uclient_http_set_write_len(struct uclient *cl, unsigned int len)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+
+ if (uh->state >= HTTP_STATE_HEADERS_SENT)
+ return -1;
+
+ if (uh->req_type == REQ_GET || uh->req_type == REQ_HEAD) {
+ fprintf(stderr, "Sending data is not supported for %s requests\n",
+ request_types[uh->req_type]);
+ return -1;
+ }
+
+ uh->send_len = len;
+ return 0;
+}
+
+static int
+uclient_http_send_data(struct uclient *cl, char *buf, unsigned int len)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+
+ if (uh->state >= HTTP_STATE_REQUEST_DONE)
+ return -1;
+
+ uclient_http_send_headers(uh);
+
+ if (len > uh->send_len) {
+ fprintf(stderr, "%s: ignoring %d extra data bytes\n", __func__, uh->send_len - len);
+ len = uh->send_len;
+ }
+
+ ustream_write(uh->us, buf, len, false);
+
+ return len;
+}
+
+static int
+uclient_http_request_done(struct uclient *cl)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+
+ if (uh->state >= HTTP_STATE_REQUEST_DONE)
+ return -1;
+
+ if (uh->send_len > 0)
+ fprintf(stderr, "%s: missing %d POST data bytes\n", __func__, uh->send_len);
+
+ uclient_http_send_headers(uh);
+ uh->state = HTTP_STATE_REQUEST_DONE;
+
+ return 0;
+}
+
+static int
+uclient_http_read(struct uclient *cl, char *buf, unsigned int len)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+ int data_len;
+ char *data;
+
+ if (uh->state < HTTP_STATE_RECV_DATA)
+ return 0;
+
+ data = ustream_get_read_buf(uh->us, &data_len);
+ if (!data || !data_len)
+ return 0;
+
+ if (len > data_len)
+ len = data_len;
+
+ memcpy(buf, data, len);
+ ustream_consume(uh->us, len);
+ uclient_notify_eof(uh);
+
+ return len;
+}
+
+const struct uclient_backend uclient_backend_http __hidden = {
+ .prefix = uclient_http_prefix,
+
+ .alloc = uclient_http_alloc,
+ .free = uclient_http_free,
+ .connect = uclient_http_connect,
+
+ .read = uclient_http_read,
+ .write = uclient_http_send_data,
+ .request = uclient_http_request_done,
+
+ .set_write_len = uclient_http_set_write_len,
+};
--- /dev/null
+#include <libubox/ustream-ssl.h>
+#include "uclient.h"
+#include "uclient-utils.h"
+#include "uclient-backend.h"
+
+static struct uclient_url *uclient_get_url(const char *url_str)
+{
+ static const struct uclient_backend *backends[] = {
+ &uclient_backend_http,
+ };
+
+ const struct uclient_backend *backend;
+ const char * const *prefix = NULL;
+ struct uclient_url *url;
+ char *url_buf, *next;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(backends); i++) {
+ int prefix_len = 0;
+
+ for (prefix = backends[i]->prefix; *prefix; prefix++) {
+ prefix_len = strlen(*prefix);
+
+ if (!strncmp(url_str, *prefix, prefix_len))
+ break;
+ }
+
+ if (!*prefix)
+ continue;
+
+ url_str += prefix_len;
+ backend = backends[i];
+ break;
+ }
+
+ if (!*prefix)
+ return NULL;
+
+ url = calloc_a(sizeof(*url), &url_buf, strlen(url_str) + 1);
+ url->backend = backend;
+ strcpy(url_buf, url_str);
+
+ next = strchr(url_buf, '/');
+ if (next) {
+ *next = 0;
+ url->location = next + 1;
+ } else {
+ url->location = "/";
+ }
+
+ url->host = url_buf;
+ next = strchr(url_buf, '@');
+ if (next) {
+ *next = 0;
+ url->host = next + 1;
+
+ if (uclient_urldecode(url_buf, url_buf, false) < 0)
+ goto free;
+
+ url->auth = url_buf;
+ }
+
+ /* Literal IPv6 address */
+ if (*url->host == '[') {
+ url->host++;
+ next = strrchr(url->host, ']');
+ if (!next)
+ goto free;
+
+ *(next++) = 0;
+ if (*next == ':')
+ url->port = next + 1;
+ } else {
+ next = strrchr(url->host, ':');
+ if (next)
+ url->port = next + 1;
+ }
+
+ return url;
+
+free:
+ free(url);
+ return NULL;
+}
+
+struct uclient *uclient_new(const char *url_str, const struct uclient_cb *cb)
+{
+ struct uclient *cl;
+ struct uclient_url *url;
+
+ url = uclient_get_url(url_str);
+ if (!url)
+ return NULL;
+
+ cl = url->backend->alloc();
+ if (!cl)
+ return NULL;
+
+ cl->backend = url->backend;
+ cl->cb = cb;
+ cl->url = url;
+
+ return cl;
+}
+
+int uclient_connect_url(struct uclient *cl, const char *url_str)
+{
+ struct uclient_url *url = cl->url;
+
+ if (url_str) {
+ url = uclient_get_url(url_str);
+ if (!url)
+ return -1;
+
+ if (url->backend != cl->backend)
+ return -1;
+
+ free(cl->url);
+ cl->url = url;
+ }
+
+ return cl->backend->connect(cl);
+}
+
+void uclient_free(struct uclient *cl)
+{
+ struct uclient_url *url = cl->url;
+
+ if (cl->backend->free)
+ cl->backend->free(cl);
+ else
+ free(cl);
+
+ free(url);
+}
+
+int uclient_write(struct uclient *cl, char *buf, int len)
+{
+ if (!cl->backend->write)
+ return -1;
+
+ return cl->backend->write(cl, buf, len);
+}
+
+int uclient_request(struct uclient *cl)
+{
+ if (!cl->backend->request)
+ return -1;
+
+ return cl->backend->request(cl);
+}
+
+int uclient_read(struct uclient *cl, char *buf, int len)
+{
+ if (!cl->backend->read)
+ return -1;
+
+ return cl->backend->read(cl, buf, len);
+}
+
+static void __uclient_backend_change_state(struct uloop_timeout *timeout)
+{
+ struct uclient *cl = container_of(timeout, struct uclient, timeout);
+
+ if (cl->error && cl->cb->error)
+ cl->cb->error(cl);
+ else if (cl->eof && cl->cb->data_eof)
+ cl->cb->data_eof(cl);
+}
+
+static void uclient_backend_change_state(struct uclient *cl)
+{
+ cl->timeout.cb = __uclient_backend_change_state;
+ uloop_timeout_set(&cl->timeout, 1);
+}
+
+void uclient_backend_set_error(struct uclient *cl)
+{
+ if (cl->error)
+ return;
+
+ cl->error = true;
+ uclient_backend_change_state(cl);
+}
+
+void __hidden uclient_backend_set_eof(struct uclient *cl)
+{
+ if (cl->eof || cl->error)
+ return;
+
+ cl->eof = true;
+ uclient_backend_change_state(cl);
+}
+
+void __hidden uclient_backend_reset_state(struct uclient *cl)
+{
+ cl->error = false;
+ cl->eof = false;
+ uloop_timeout_cancel(&cl->timeout);
+}
projects / oweals / uclient.git / commitdiff