Line data Source code
1 : /*
2 : *
3 : * Copyright 2015, Google Inc.
4 : * All rights reserved.
5 : *
6 : * Redistribution and use in source and binary forms, with or without
7 : * modification, are permitted provided that the following conditions are
8 : * met:
9 : *
10 : * * Redistributions of source code must retain the above copyright
11 : * notice, this list of conditions and the following disclaimer.
12 : * * Redistributions in binary form must reproduce the above
13 : * copyright notice, this list of conditions and the following disclaimer
14 : * in the documentation and/or other materials provided with the
15 : * distribution.
16 : * * Neither the name of Google Inc. nor the names of its
17 : * contributors may be used to endorse or promote products derived from
18 : * this software without specific prior written permission.
19 : *
20 : * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 : * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 : * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 : * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 : * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 : * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 : * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 : * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 : * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 : * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 : *
32 : */
33 :
34 : #include "src/core/iomgr/sockaddr.h"
35 : #include "src/core/httpcli/httpcli.h"
36 :
37 : #include <string.h>
38 :
39 : #include "src/core/iomgr/endpoint.h"
40 : #include "src/core/iomgr/resolve_address.h"
41 : #include "src/core/iomgr/tcp_client.h"
42 : #include "src/core/httpcli/format_request.h"
43 : #include "src/core/httpcli/parser.h"
44 : #include "src/core/support/string.h"
45 : #include <grpc/support/alloc.h>
46 : #include <grpc/support/log.h>
47 : #include <grpc/support/string_util.h>
48 :
49 : typedef struct {
50 : gpr_slice request_text;
51 : grpc_httpcli_parser parser;
52 : grpc_resolved_addresses *addresses;
53 : size_t next_address;
54 : grpc_endpoint *ep;
55 : char *host;
56 : gpr_timespec deadline;
57 : int have_read_byte;
58 : const grpc_httpcli_handshaker *handshaker;
59 : grpc_httpcli_response_cb on_response;
60 : void *user_data;
61 : grpc_httpcli_context *context;
62 : grpc_pollset *pollset;
63 : grpc_iomgr_object iomgr_obj;
64 : gpr_slice_buffer incoming;
65 : gpr_slice_buffer outgoing;
66 : grpc_closure on_read;
67 : grpc_closure done_write;
68 : grpc_closure connected;
69 : } internal_request;
70 :
71 : static grpc_httpcli_get_override g_get_override = NULL;
72 : static grpc_httpcli_post_override g_post_override = NULL;
73 :
74 2904 : static void plaintext_handshake(grpc_exec_ctx *exec_ctx, void *arg,
75 : grpc_endpoint *endpoint, const char *host,
76 : void (*on_done)(grpc_exec_ctx *exec_ctx,
77 : void *arg,
78 : grpc_endpoint *endpoint)) {
79 2904 : on_done(exec_ctx, arg, endpoint);
80 2904 : }
81 :
82 : const grpc_httpcli_handshaker grpc_httpcli_plaintext = {"http",
83 : plaintext_handshake};
84 :
85 2915 : void grpc_httpcli_context_init(grpc_httpcli_context *context) {
86 2915 : grpc_pollset_set_init(&context->pollset_set);
87 2915 : }
88 :
89 2914 : void grpc_httpcli_context_destroy(grpc_httpcli_context *context) {
90 2914 : grpc_pollset_set_destroy(&context->pollset_set);
91 2914 : }
92 :
93 : static void next_address(grpc_exec_ctx *exec_ctx, internal_request *req);
94 :
95 2904 : static void finish(grpc_exec_ctx *exec_ctx, internal_request *req,
96 : int success) {
97 2904 : grpc_pollset_set_del_pollset(exec_ctx, &req->context->pollset_set,
98 : req->pollset);
99 2904 : req->on_response(exec_ctx, req->user_data, success ? &req->parser.r : NULL);
100 2904 : grpc_httpcli_parser_destroy(&req->parser);
101 2904 : if (req->addresses != NULL) {
102 2904 : grpc_resolved_addresses_destroy(req->addresses);
103 : }
104 2904 : if (req->ep != NULL) {
105 2904 : grpc_endpoint_destroy(exec_ctx, req->ep);
106 : }
107 2904 : gpr_slice_unref(req->request_text);
108 2904 : gpr_free(req->host);
109 2904 : grpc_iomgr_unregister_object(&req->iomgr_obj);
110 2904 : gpr_slice_buffer_destroy(&req->incoming);
111 2904 : gpr_slice_buffer_destroy(&req->outgoing);
112 2904 : gpr_free(req);
113 2904 : }
114 :
115 : static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, int success);
116 :
117 15019 : static void do_read(grpc_exec_ctx *exec_ctx, internal_request *req) {
118 15019 : grpc_endpoint_read(exec_ctx, req->ep, &req->incoming, &req->on_read);
119 15019 : }
120 :
121 15019 : static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, int success) {
122 15019 : internal_request *req = user_data;
123 : size_t i;
124 :
125 27134 : for (i = 0; i < req->incoming.count; i++) {
126 12115 : if (GPR_SLICE_LENGTH(req->incoming.slices[i])) {
127 12115 : req->have_read_byte = 1;
128 12115 : if (!grpc_httpcli_parser_parse(&req->parser, req->incoming.slices[i])) {
129 0 : finish(exec_ctx, req, 0);
130 15019 : return;
131 : }
132 : }
133 : }
134 :
135 15019 : if (success) {
136 12115 : do_read(exec_ctx, req);
137 2904 : } else if (!req->have_read_byte) {
138 0 : next_address(exec_ctx, req);
139 : } else {
140 2904 : finish(exec_ctx, req, grpc_httpcli_parser_eof(&req->parser));
141 : }
142 : }
143 :
144 2904 : static void on_written(grpc_exec_ctx *exec_ctx, internal_request *req) {
145 2904 : do_read(exec_ctx, req);
146 2904 : }
147 :
148 2904 : static void done_write(grpc_exec_ctx *exec_ctx, void *arg, int success) {
149 2904 : internal_request *req = arg;
150 2904 : if (success) {
151 2904 : on_written(exec_ctx, req);
152 : } else {
153 0 : next_address(exec_ctx, req);
154 : }
155 2904 : }
156 :
157 2904 : static void start_write(grpc_exec_ctx *exec_ctx, internal_request *req) {
158 2904 : gpr_slice_ref(req->request_text);
159 2904 : gpr_slice_buffer_add(&req->outgoing, req->request_text);
160 2904 : grpc_endpoint_write(exec_ctx, req->ep, &req->outgoing, &req->done_write);
161 2904 : }
162 :
163 2904 : static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
164 : grpc_endpoint *ep) {
165 2904 : internal_request *req = arg;
166 :
167 2904 : if (!ep) {
168 0 : next_address(exec_ctx, req);
169 2904 : return;
170 : }
171 :
172 2904 : req->ep = ep;
173 2904 : start_write(exec_ctx, req);
174 : }
175 :
176 2904 : static void on_connected(grpc_exec_ctx *exec_ctx, void *arg, int success) {
177 2904 : internal_request *req = arg;
178 :
179 2904 : if (!req->ep) {
180 0 : next_address(exec_ctx, req);
181 2904 : return;
182 : }
183 2904 : req->handshaker->handshake(exec_ctx, req, req->ep, req->host,
184 : on_handshake_done);
185 : }
186 :
187 2904 : static void next_address(grpc_exec_ctx *exec_ctx, internal_request *req) {
188 : grpc_resolved_address *addr;
189 2904 : if (req->next_address == req->addresses->naddrs) {
190 0 : finish(exec_ctx, req, 0);
191 2904 : return;
192 : }
193 2904 : addr = &req->addresses->addrs[req->next_address++];
194 2904 : grpc_closure_init(&req->connected, on_connected, req);
195 5808 : grpc_tcp_client_connect(
196 2904 : exec_ctx, &req->connected, &req->ep, &req->context->pollset_set,
197 2904 : (struct sockaddr *)&addr->addr, addr->len, req->deadline);
198 : }
199 :
200 2904 : static void on_resolved(grpc_exec_ctx *exec_ctx, void *arg,
201 : grpc_resolved_addresses *addresses) {
202 2904 : internal_request *req = arg;
203 2904 : if (!addresses) {
204 0 : finish(exec_ctx, req, 0);
205 2904 : return;
206 : }
207 2904 : req->addresses = addresses;
208 2904 : req->next_address = 0;
209 2904 : next_address(exec_ctx, req);
210 : }
211 :
212 2904 : static void internal_request_begin(
213 : grpc_exec_ctx *exec_ctx, grpc_httpcli_context *context,
214 : grpc_pollset *pollset, const grpc_httpcli_request *request,
215 : gpr_timespec deadline, grpc_httpcli_response_cb on_response,
216 : void *user_data, const char *name, gpr_slice request_text) {
217 2904 : internal_request *req = gpr_malloc(sizeof(internal_request));
218 2904 : memset(req, 0, sizeof(*req));
219 2904 : req->request_text = request_text;
220 2904 : grpc_httpcli_parser_init(&req->parser);
221 2904 : req->on_response = on_response;
222 2904 : req->user_data = user_data;
223 2904 : req->deadline = deadline;
224 2904 : req->handshaker =
225 2904 : request->handshaker ? request->handshaker : &grpc_httpcli_plaintext;
226 2904 : req->context = context;
227 2904 : req->pollset = pollset;
228 2904 : grpc_closure_init(&req->on_read, on_read, req);
229 2904 : grpc_closure_init(&req->done_write, done_write, req);
230 2904 : gpr_slice_buffer_init(&req->incoming);
231 2904 : gpr_slice_buffer_init(&req->outgoing);
232 2904 : grpc_iomgr_register_object(&req->iomgr_obj, name);
233 2904 : req->host = gpr_strdup(request->host);
234 :
235 2904 : grpc_pollset_set_add_pollset(exec_ctx, &req->context->pollset_set,
236 : req->pollset);
237 2904 : grpc_resolve_address(request->host, req->handshaker->default_port,
238 : on_resolved, req);
239 2904 : }
240 :
241 2913 : void grpc_httpcli_get(grpc_exec_ctx *exec_ctx, grpc_httpcli_context *context,
242 : grpc_pollset *pollset,
243 : const grpc_httpcli_request *request,
244 : gpr_timespec deadline,
245 : grpc_httpcli_response_cb on_response, void *user_data) {
246 : char *name;
247 2923 : if (g_get_override &&
248 10 : g_get_override(exec_ctx, request, deadline, on_response, user_data)) {
249 2923 : return;
250 : }
251 2903 : gpr_asprintf(&name, "HTTP:GET:%s:%s", request->host, request->path);
252 2903 : internal_request_begin(exec_ctx, context, pollset, request, deadline,
253 : on_response, user_data, name,
254 : grpc_httpcli_format_get_request(request));
255 2903 : gpr_free(name);
256 : }
257 :
258 3 : void grpc_httpcli_post(grpc_exec_ctx *exec_ctx, grpc_httpcli_context *context,
259 : grpc_pollset *pollset,
260 : const grpc_httpcli_request *request,
261 : const char *body_bytes, size_t body_size,
262 : gpr_timespec deadline,
263 : grpc_httpcli_response_cb on_response, void *user_data) {
264 : char *name;
265 5 : if (g_post_override &&
266 2 : g_post_override(exec_ctx, request, body_bytes, body_size, deadline,
267 : on_response, user_data)) {
268 5 : return;
269 : }
270 1 : gpr_asprintf(&name, "HTTP:POST:%s:%s", request->host, request->path);
271 1 : internal_request_begin(
272 : exec_ctx, context, pollset, request, deadline, on_response, user_data,
273 : name, grpc_httpcli_format_post_request(request, body_bytes, body_size));
274 1 : gpr_free(name);
275 : }
276 :
277 26 : void grpc_httpcli_set_override(grpc_httpcli_get_override get,
278 : grpc_httpcli_post_override post) {
279 26 : g_get_override = get;
280 26 : g_post_override = post;
281 26 : }
|
