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[motion2.git] / legacy-libs / grpc / deps / grpc / src / core / lib / http / httpcli.h
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+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_HTTP_HTTPCLI_H
+#define GRPC_CORE_LIB_HTTP_HTTPCLI_H
+
+#include <grpc/support/port_platform.h>
+
+#include <stddef.h>
+
+#include <grpc/support/time.h>
+
+#include "src/core/lib/http/parser.h"
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/polling_entity.h"
+#include "src/core/lib/iomgr/pollset_set.h"
+
+/* User agent this library reports */
+#define GRPC_HTTPCLI_USER_AGENT "grpc-httpcli/0.0"
+
+/* Tracks in-progress http requests
+   TODO(ctiller): allow caching and capturing multiple requests for the
+                  same content and combining them */
+typedef struct grpc_httpcli_context {
+  grpc_pollset_set* pollset_set;
+} grpc_httpcli_context;
+
+typedef struct {
+  const char* default_port;
+  void (*handshake)(void* arg, grpc_endpoint* endpoint, const char* host,
+                    grpc_millis deadline,
+                    void (*on_done)(void* arg, grpc_endpoint* endpoint));
+} grpc_httpcli_handshaker;
+
+extern const grpc_httpcli_handshaker grpc_httpcli_plaintext;
+extern const grpc_httpcli_handshaker grpc_httpcli_ssl;
+
+/* A request */
+typedef struct grpc_httpcli_request {
+  /* The host name to connect to */
+  char* host;
+  /* The host to verify in the SSL handshake (or NULL) */
+  char* ssl_host_override;
+  /* The main part of the request
+     The following headers are supplied automatically and MUST NOT be set here:
+     Host, Connection, User-Agent */
+  grpc_http_request http;
+  /* handshaker to use ssl for the request */
+  const grpc_httpcli_handshaker* handshaker;
+} grpc_httpcli_request;
+
+/* Expose the parser response type as a httpcli response too */
+typedef struct grpc_http_response grpc_httpcli_response;
+
+void grpc_httpcli_context_init(grpc_httpcli_context* context);
+void grpc_httpcli_context_destroy(grpc_httpcli_context* context);
+
+/* Asynchronously perform a HTTP GET.
+   'context' specifies the http context under which to do the get
+   'pollset' indicates a grpc_pollset that is interested in the result
+     of the get - work on this pollset may be used to progress the get
+     operation
+   'request' contains request parameters - these are caller owned and can be
+     destroyed once the call returns
+   'deadline' contains a deadline for the request (or gpr_inf_future)
+   'on_response' is a callback to report results to */
+void grpc_httpcli_get(grpc_httpcli_context* context,
+                      grpc_polling_entity* pollent,
+                      grpc_resource_quota* resource_quota,
+                      const grpc_httpcli_request* request, grpc_millis deadline,
+                      grpc_closure* on_complete,
+                      grpc_httpcli_response* response);
+
+/* Asynchronously perform a HTTP POST.
+   'context' specifies the http context under which to do the post
+   'pollset' indicates a grpc_pollset that is interested in the result
+     of the post - work on this pollset may be used to progress the post
+     operation
+   'request' contains request parameters - these are caller owned and can be
+     destroyed once the call returns
+   'body_bytes' and 'body_size' specify the payload for the post.
+     When there is no body, pass in NULL as body_bytes.
+   'deadline' contains a deadline for the request (or gpr_inf_future)
+   'em' points to a caller owned event manager that must be alive for the
+     lifetime of the request
+   'on_response' is a callback to report results to
+   Does not support ?var1=val1&var2=val2 in the path. */
+void grpc_httpcli_post(grpc_httpcli_context* context,
+                       grpc_polling_entity* pollent,
+                       grpc_resource_quota* resource_quota,
+                       const grpc_httpcli_request* request,
+                       const char* body_bytes, size_t body_size,
+                       grpc_millis deadline, grpc_closure* on_complete,
+                       grpc_httpcli_response* response);
+
+/* override functions return 1 if they handled the request, 0 otherwise */
+typedef int (*grpc_httpcli_get_override)(const grpc_httpcli_request* request,
+                                         grpc_millis deadline,
+                                         grpc_closure* on_complete,
+                                         grpc_httpcli_response* response);
+typedef int (*grpc_httpcli_post_override)(const grpc_httpcli_request* request,
+                                          const char* body_bytes,
+                                          size_t body_size,
+                                          grpc_millis deadline,
+                                          grpc_closure* on_complete,
+                                          grpc_httpcli_response* response);
+
+void grpc_httpcli_set_override(grpc_httpcli_get_override get,
+                               grpc_httpcli_post_override post);
+
+#endif /* GRPC_CORE_LIB_HTTP_HTTPCLI_H */