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1 /*
2  *
3  * Copyright 2015 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  */
18 
19 #include <grpc/support/port_platform.h>
20 
21 #include "src/core/lib/http/format_request.h"
22 
23 #include <stdarg.h>
24 #include <stdio.h>
25 #include <string.h>
26 
27 #include <grpc/slice.h>
28 #include <grpc/support/alloc.h>
29 #include <grpc/support/string_util.h>
30 #include "src/core/lib/gpr/string.h"
31 
fill_common_header(const grpc_httpcli_request * request,gpr_strvec * buf,bool connection_close)32 static void fill_common_header(const grpc_httpcli_request* request,
33                                gpr_strvec* buf, bool connection_close) {
34   size_t i;
35   gpr_strvec_add(buf, gpr_strdup(request->http.path));
36   gpr_strvec_add(buf, gpr_strdup(" HTTP/1.0\r\n"));
37   /* just in case some crazy server really expects HTTP/1.1 */
38   gpr_strvec_add(buf, gpr_strdup("Host: "));
39   gpr_strvec_add(buf, gpr_strdup(request->host));
40   gpr_strvec_add(buf, gpr_strdup("\r\n"));
41   if (connection_close)
42     gpr_strvec_add(buf, gpr_strdup("Connection: close\r\n"));
43   gpr_strvec_add(buf,
44                  gpr_strdup("User-Agent: " GRPC_HTTPCLI_USER_AGENT "\r\n"));
45   /* user supplied headers */
46   for (i = 0; i < request->http.hdr_count; i++) {
47     gpr_strvec_add(buf, gpr_strdup(request->http.hdrs[i].key));
48     gpr_strvec_add(buf, gpr_strdup(": "));
49     gpr_strvec_add(buf, gpr_strdup(request->http.hdrs[i].value));
50     gpr_strvec_add(buf, gpr_strdup("\r\n"));
51   }
52 }
53 
grpc_httpcli_format_get_request(const grpc_httpcli_request * request)54 grpc_slice grpc_httpcli_format_get_request(
55     const grpc_httpcli_request* request) {
56   gpr_strvec out;
57   char* flat;
58   size_t flat_len;
59 
60   gpr_strvec_init(&out);
61   gpr_strvec_add(&out, gpr_strdup("GET "));
62   fill_common_header(request, &out, true);
63   gpr_strvec_add(&out, gpr_strdup("\r\n"));
64 
65   flat = gpr_strvec_flatten(&out, &flat_len);
66   gpr_strvec_destroy(&out);
67 
68   return grpc_slice_new(flat, flat_len, gpr_free);
69 }
70 
grpc_httpcli_format_post_request(const grpc_httpcli_request * request,const char * body_bytes,size_t body_size)71 grpc_slice grpc_httpcli_format_post_request(const grpc_httpcli_request* request,
72                                             const char* body_bytes,
73                                             size_t body_size) {
74   gpr_strvec out;
75   char* tmp;
76   size_t out_len;
77   size_t i;
78 
79   gpr_strvec_init(&out);
80 
81   gpr_strvec_add(&out, gpr_strdup("POST "));
82   fill_common_header(request, &out, true);
83   if (body_bytes) {
84     uint8_t has_content_type = 0;
85     for (i = 0; i < request->http.hdr_count; i++) {
86       if (strcmp(request->http.hdrs[i].key, "Content-Type") == 0) {
87         has_content_type = 1;
88         break;
89       }
90     }
91     if (!has_content_type) {
92       gpr_strvec_add(&out, gpr_strdup("Content-Type: text/plain\r\n"));
93     }
94     gpr_asprintf(&tmp, "Content-Length: %lu\r\n",
95                  static_cast<unsigned long>(body_size));
96     gpr_strvec_add(&out, tmp);
97   }
98   gpr_strvec_add(&out, gpr_strdup("\r\n"));
99   tmp = gpr_strvec_flatten(&out, &out_len);
100   gpr_strvec_destroy(&out);
101 
102   if (body_bytes) {
103     tmp = static_cast<char*>(gpr_realloc(tmp, out_len + body_size));
104     memcpy(tmp + out_len, body_bytes, body_size);
105     out_len += body_size;
106   }
107 
108   return grpc_slice_new(tmp, out_len, gpr_free);
109 }
110 
grpc_httpcli_format_connect_request(const grpc_httpcli_request * request)111 grpc_slice grpc_httpcli_format_connect_request(
112     const grpc_httpcli_request* request) {
113   gpr_strvec out;
114   gpr_strvec_init(&out);
115   gpr_strvec_add(&out, gpr_strdup("CONNECT "));
116   fill_common_header(request, &out, false);
117   gpr_strvec_add(&out, gpr_strdup("\r\n"));
118   size_t flat_len;
119   char* flat = gpr_strvec_flatten(&out, &flat_len);
120   gpr_strvec_destroy(&out);
121   return grpc_slice_new(flat, flat_len, gpr_free);
122 }
123