refactoring
[src/app-framework-binder.git] / src / afb-rest-api.c
diff --git a/src/afb-rest-api.c b/src/afb-rest-api.c
new file mode 100644 (file)
index 0000000..febe19f
--- /dev/null
@@ -0,0 +1,617 @@
+/*
+ * Copyright (C) 2016 "IoT.bzh"
+ * Author "Fulup Ar Foll"
+ * Author José Bollo <jose.bollo@iot.bzh>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ * Contain all generic part to handle REST/API
+ * 
+ *  https://www.gnu.org/software/libmicrohttpd/tutorial.html [search 'largepost.c']
+ */
+
+#define _GNU_SOURCE
+
+#include "../include/local-def.h"
+
+#include <dirent.h>
+#include <dlfcn.h>
+#include <setjmp.h>
+#include <signal.h>
+
+#include "afb-apis.h"
+
+#define AFB_MSG_JTYPE "AJB_reply"
+
+#define JSON_CONTENT  "application/json"
+#define FORM_CONTENT  "multipart/form-data"    /* TODO: replace with MHD_HTTP_POST_ENCODING_MULTIPART_FORMDATA */
+
+static json_object *afbJsonType;
+
+// Because of POST call multiple time requestApi we need to free POST handle here
+// Note this method is called from http-svc just before closing session
+PUBLIC void endPostRequest(AFB_PostHandle * postHandle)
+{
+
+       if (postHandle->type == AFB_POST_JSON) {
+               // if (verbose) fprintf(stderr, "End PostJson Request UID=%d\n", postHandle->uid);
+       }
+
+       if (postHandle->type == AFB_POST_FORM) {
+               if (verbose)
+                       fprintf(stderr, "End PostForm Request UID=%d\n", postHandle->uid);
+       }
+       if (postHandle->privatebuf)
+               free(postHandle->privatebuf);
+       free(postHandle);
+}
+
+// Check of apiurl is declare in this plugin and call it
+static AFB_error doCallPluginApi(AFB_request * request, int apiidx, int verbidx, void *context)
+{
+       enum AFB_sessionE session;
+       json_object *jresp, *jcall, *jreqt;
+       AFB_clientCtx *clientCtx = NULL;
+
+       // Request was found and at least partially executed
+       jreqt = json_object_new_object();
+       json_object_get(afbJsonType);   // increate jsontype reference count
+       json_object_object_add(jreqt, "jtype", afbJsonType);
+
+       // prepare an object to store calling values
+       jcall = json_object_new_object();
+       json_object_object_add(jcall, "prefix", json_object_new_string(request->prefix));
+       json_object_object_add(jcall, "api", json_object_new_string(request->api));
+
+       // Out of SessionNone every call get a client context session
+       session = afb_apis_get(apiidx, verbidx)->session;
+       if (AFB_SESSION_NONE != session) {
+
+               // add client context to request
+               clientCtx = ctxClientGet(request, apiidx);
+               if (clientCtx == NULL) {
+                       request->errcode = MHD_HTTP_INSUFFICIENT_STORAGE;
+                       json_object_object_add(jcall, "status", json_object_new_string("fail"));
+                       json_object_object_add(jcall, "info", json_object_new_string("Client Session Context Full !!!"));
+                       json_object_object_add(jreqt, "request", jcall);
+                       goto ExitOnDone;
+               };
+
+               if (verbose)
+                       fprintf(stderr, "Plugin=[%s] Api=[%s] Middleware=[%d] Client=[%p] Uuid=[%s] Token=[%s]\n", request->prefix, request->api, session, clientCtx, clientCtx->uuid, clientCtx->token);
+
+               switch (session) {
+
+               case AFB_SESSION_CREATE:
+                       if (clientCtx->token[0] != '\0' && request->config->token[0] != '\0') {
+                               request->errcode = MHD_HTTP_UNAUTHORIZED;
+                               json_object_object_add(jcall, "status", json_object_new_string("exist"));
+                               json_object_object_add(jcall, "info", json_object_new_string("AFB_SESSION_CREATE Session already exist"));
+                               json_object_object_add(jreqt, "request", jcall);
+                               goto ExitOnDone;
+                       }
+
+                       if (AFB_SUCCESS != ctxTokenCreate(clientCtx, request)) {
+                               request->errcode = MHD_HTTP_UNAUTHORIZED;
+                               json_object_object_add(jcall, "status", json_object_new_string("fail"));
+                               json_object_object_add(jcall, "info", json_object_new_string("AFB_SESSION_CREATE Invalid Initial Token"));
+                               json_object_object_add(jreqt, "request", jcall);
+                               goto ExitOnDone;
+                       } else {
+                               json_object_object_add(jcall, "uuid", json_object_new_string(clientCtx->uuid));
+                               json_object_object_add(jcall, "token", json_object_new_string(clientCtx->token));
+                               json_object_object_add(jcall, "timeout", json_object_new_int(request->config->cntxTimeout));
+                       }
+                       break;
+
+               case AFB_SESSION_RENEW:
+                       if (AFB_SUCCESS != ctxTokenRefresh(clientCtx, request)) {
+                               request->errcode = MHD_HTTP_UNAUTHORIZED;
+                               json_object_object_add(jcall, "status", json_object_new_string("fail"));
+                               json_object_object_add(jcall, "info", json_object_new_string("AFB_SESSION_REFRESH Broken Exchange Token Chain"));
+                               json_object_object_add(jreqt, "request", jcall);
+                               goto ExitOnDone;
+                       } else {
+                               json_object_object_add(jcall, "uuid", json_object_new_string(clientCtx->uuid));
+                               json_object_object_add(jcall, "token", json_object_new_string(clientCtx->token));
+                               json_object_object_add(jcall, "timeout", json_object_new_int(request->config->cntxTimeout));
+                       }
+                       break;
+
+               case AFB_SESSION_CLOSE:
+                       if (AFB_SUCCESS != ctxTokenCheck(clientCtx, request)) {
+                               request->errcode = MHD_HTTP_UNAUTHORIZED;
+                               json_object_object_add(jcall, "status", json_object_new_string("empty"));
+                               json_object_object_add(jcall, "info", json_object_new_string("AFB_SESSION_CLOSE Not a Valid Access Token"));
+                               json_object_object_add(jreqt, "request", jcall);
+                               goto ExitOnDone;
+                       } else {
+                               json_object_object_add(jcall, "uuid", json_object_new_string(clientCtx->uuid));
+                       }
+                       break;
+
+               case AFB_SESSION_CHECK:
+               default:
+                       // default action is check
+                       if (AFB_SUCCESS != ctxTokenCheck(clientCtx, request)) {
+                               request->errcode = MHD_HTTP_UNAUTHORIZED;
+                               json_object_object_add(jcall, "status", json_object_new_string("fail"));
+                               json_object_object_add(jcall, "info", json_object_new_string("AFB_SESSION_CHECK Invalid Active Token"));
+                               json_object_object_add(jreqt, "request", jcall);
+                               goto ExitOnDone;
+                       }
+                       break;
+               }
+       }
+       // Effectively CALL PLUGIN API with a subset of the context
+       jresp = afb_apis_get(apiidx, verbidx)->callback(request, context);
+
+       // Store context in case it was updated by plugins
+       if (request->context != NULL)
+               clientCtx->contexts[apiidx] = request->context;
+
+       // handle intermediary Post Iterates out of band
+       if ((jresp == NULL) && (request->errcode == MHD_HTTP_OK))
+               return AFB_SUCCESS;
+
+       // Session close is done after the API call so API can still use session in closing API
+       if (AFB_SESSION_CLOSE == session)
+               ctxTokenReset(clientCtx, request);
+
+       // API should return NULL of a valid Json Object
+       if (jresp == NULL) {
+               json_object_object_add(jcall, "status", json_object_new_string("null"));
+               json_object_object_add(jreqt, "request", jcall);
+               request->errcode = MHD_HTTP_NO_RESPONSE;
+
+       } else {
+               json_object_object_add(jcall, "status", json_object_new_string("processed"));
+               json_object_object_add(jreqt, "request", jcall);
+               json_object_object_add(jreqt, "response", jresp);
+       }
+
+ExitOnDone:
+       request->jresp = jreqt;
+       return AFB_DONE;
+}
+
+// Check of apiurl is declare in this plugin and call it
+extern __thread sigjmp_buf *error_handler;
+static AFB_error callPluginApi(AFB_request * request, int apiidx, int verbidx, void *context)
+{
+       sigjmp_buf jmpbuf;
+
+       json_object *jcall, *jreqt;
+       int status;
+
+       // save context before calling the API
+       status = setjmp(jmpbuf);
+       if (status != 0) {
+
+               // Request was found and at least partially executed
+               jreqt = json_object_new_object();
+               json_object_get(afbJsonType);   // increate jsontype reference count
+               json_object_object_add(jreqt, "jtype", afbJsonType);
+
+               // prepare an object to store calling values
+               jcall = json_object_new_object();
+               json_object_object_add(jcall, "prefix", json_object_new_string(request->prefix));
+               json_object_object_add(jcall, "api", json_object_new_string(request->api));
+
+               // Plugin aborted somewhere during its execution
+               json_object_object_add(jcall, "status", json_object_new_string("abort"));
+               json_object_object_add(jcall, "info", json_object_new_string("Plugin broke during execution"));
+               json_object_object_add(jreqt, "request", jcall);
+               request->jresp = jreqt;
+               goto ExitOnDone;
+
+       } else {
+
+               // Trigger a timer to protect from unacceptable long time execution
+               if (request->config->apiTimeout > 0)
+                       alarm((unsigned)request->config->apiTimeout);
+
+               error_handler = &jmpbuf;
+               doCallPluginApi(request, apiidx, verbidx, context);
+               error_handler = NULL;
+
+               // cancel timeout and plugin signal handle before next call
+               alarm(0);
+       }
+
+ExitOnDone:
+       return AFB_DONE;
+}
+
+STATIC AFB_error findAndCallApi(AFB_request * request, void *context)
+{
+       int apiidx, verbidx;
+       AFB_error status;
+
+       if (!request->api || !request->prefix)
+               return AFB_FAIL;
+
+       /* get the plugin if any */
+       apiidx = afb_apis_get_apiidx(request->prefix, 0);
+       if (apiidx < 0) {
+               request->jresp = jsonNewMessage(AFB_FATAL, "No Plugin=[%s] Url=%s", request->prefix, request->url);
+               request->errcode = MHD_HTTP_UNPROCESSABLE_ENTITY;
+               return AFB_FAIL;
+       }
+
+       /* get the verb if any */
+       verbidx = afb_apis_get_verbidx(apiidx, request->api);
+       if (verbidx < 0) {
+               request->jresp = jsonNewMessage(AFB_FATAL, "No API=[%s] for Plugin=[%s] url=[%s]", request->api, request->prefix, request->url);
+               request->errcode = MHD_HTTP_UNPROCESSABLE_ENTITY;
+               return AFB_FAIL;
+       }
+
+       /* Search for a plugin with this urlpath */
+       status = callPluginApi(request, apiidx, verbidx, context);
+
+       /* plugin callback did not return a valid Json Object */
+       if (status == AFB_FAIL) {
+               request->jresp = jsonNewMessage(AFB_FATAL, "No API=[%s] for Plugin=[%s] url=[%s]", request->api, request->prefix, request->url);
+               request->errcode = MHD_HTTP_UNPROCESSABLE_ENTITY;
+               return AFB_FAIL;
+       }
+       // Everything look OK
+       return status;
+}
+
+// This CB is call for every item with a form post it reformat iterator values
+// and callback Plugin API for each Item within PostForm.
+STATIC int doPostIterate(void *cls, enum MHD_ValueKind kind, const char *key, const char *filename, const char *mimetype, const char *encoding, const char *data, uint64_t offset, size_t size)
+{
+
+       AFB_error status;
+       AFB_PostItem item;
+
+       // retrieve API request from Post iterator handle  
+       AFB_PostHandle *postHandle = (AFB_PostHandle *) cls;
+       AFB_request *request = (AFB_request *) postHandle->privatebuf;
+       AFB_PostRequest postRequest;
+
+       if (verbose)
+               fprintf(stderr, "postHandle key=%s filename=%s len=%zu mime=%s\n", key, filename, size, mimetype);
+
+       // Create and Item value for Plugin API
+       item.kind = kind;
+       item.key = key;
+       item.filename = filename;
+       item.mimetype = mimetype;
+       item.encoding = encoding;
+       item.len = size;
+       item.data = data;
+       item.offset = offset;
+
+       // Reformat Request to make it somehow similar to GET/PostJson case
+       postRequest.data = (char *)postHandle;
+       postRequest.len = size;
+       postRequest.type = AFB_POST_FORM;;
+       request->post = &postRequest;
+
+       // effectively call plugin API                 
+       status = findAndCallApi(request, &item);
+       // when returning no processing of postform stop
+       if (status != AFB_SUCCESS)
+               return MHD_NO;
+
+       // let's allow iterator to move to next item
+       return MHD_YES;
+}
+
+STATIC void freeRequest(AFB_request * request)
+{
+
+       free(request->prefix);
+       free(request->api);
+       free(request);
+}
+
+STATIC AFB_request *createRequest(struct MHD_Connection *connection, AFB_session * session, const char *url)
+{
+
+       AFB_request *request;
+
+       // Start with a clean request
+       request = calloc(1, sizeof(AFB_request));
+       char *urlcpy1, *urlcpy2;
+       char *baseapi, *baseurl;
+
+       // Extract plugin urlpath from request and make two copy because strsep overload copy
+       urlcpy1 = urlcpy2 = strdup(url);
+       baseurl = strsep(&urlcpy2, "/");
+       if (baseurl == NULL) {
+               request->jresp = jsonNewMessage(AFB_FATAL, "Invalid API call url=[%s]", url);
+               request->errcode = MHD_HTTP_BAD_REQUEST;
+               goto Done;
+       }
+       // let's compute URL and call API
+       baseapi = strsep(&urlcpy2, "/");
+       if (baseapi == NULL) {
+               request->jresp = jsonNewMessage(AFB_FATAL, "Invalid API call plugin=[%s] url=[%s]", baseurl, url);
+               request->errcode = MHD_HTTP_BAD_REQUEST;
+               goto Done;
+       }
+       // build request structure
+       request->connection = connection;
+       request->config = session->config;
+       request->url = url;
+       request->prefix = strdup(baseurl);
+       request->api = strdup(baseapi);
+
+ Done:
+       free(urlcpy1);
+       return (request);
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+static int doRestApiPost(struct MHD_Connection *connection, AFB_session * session, const char *url, const char *method, const char *upload_data, size_t * upload_data_size, void **con_cls)
+{
+
+       static int postcount = 0;       // static counter to debug POST protocol
+       json_object *errMessage;
+       AFB_error status;
+       struct MHD_Response *webResponse;
+       const char *serialized;
+       AFB_request *request = NULL;
+       AFB_PostHandle *postHandle;
+       AFB_PostRequest postRequest;
+       int ret;
+
+       // fprintf (stderr, "doRestAPI method=%s posthandle=%p\n", method, con_cls);
+
+       // if post data may come in multiple calls
+       const char *encoding, *param;
+       int contentlen = -1;
+       postHandle = *con_cls;
+
+       // This is the initial post event let's create form post structure POST data come in multiple events
+       if (postHandle == NULL) {
+
+               // allocate application POST processor handle to zero
+               postHandle = calloc(1, sizeof(AFB_PostHandle));
+               postHandle->uid = postcount++;  // build a UID for DEBUG
+               *con_cls = postHandle;  // update context with posthandle
+
+               // Let make sure we have the right encoding and a valid length
+               encoding = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_CONTENT_TYPE);
+
+               // We are facing an empty post let's process it as a get
+               if (encoding == NULL) {
+                       postHandle->type = AFB_POST_EMPTY;
+                       return MHD_YES;
+               }
+               // Form post is handle through a PostProcessor and call API once per form key
+               if (strcasestr(encoding, FORM_CONTENT) != NULL) {
+                       if (verbose)
+                               fprintf(stderr, "Create doPostIterate[uid=%d posthandle=%p]\n", postHandle->uid, postHandle);
+
+                       request = createRequest(connection, session, url);
+                       if (request->jresp != NULL)
+                               goto ProcessApiCall;
+                       postHandle->type = AFB_POST_FORM;
+                       postHandle->privatebuf = (void *)request;
+                       postHandle->pp = MHD_create_post_processor(connection, MAX_POST_SIZE, &doPostIterate, postHandle);
+
+                       if (NULL == postHandle->pp) {
+                               fprintf(stderr, "OOPS: Internal error fail to allocate MHD_create_post_processor\n");
+                               free(postHandle);
+                               return MHD_NO;
+                       }
+                       return MHD_YES;
+               }
+               // POST json is store into a buffer and present in one piece to API
+               if (strcasestr(encoding, JSON_CONTENT) != NULL) {
+
+                       param = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_CONTENT_LENGTH);
+                       if (param)
+                               sscanf(param, "%i", &contentlen);
+
+                       // Because PostJson are build in RAM size is constrained
+                       if (contentlen > MAX_POST_SIZE) {
+                               errMessage = jsonNewMessage(AFB_FATAL, "Post Date to big %d > %d", contentlen, MAX_POST_SIZE);
+                               goto ExitOnError;
+                       }
+                       // Size is OK, let's allocate a buffer to hold post data
+                       postHandle->type = AFB_POST_JSON;
+                       postHandle->privatebuf = malloc((unsigned)contentlen + 1);      // allocate memory for full POST data + 1 for '\0' enf of string
+
+                       // if (verbose) fprintf(stderr, "Create PostJson[uid=%d] Size=%d\n", postHandle->uid, contentlen);
+                       return MHD_YES;
+
+               } else {
+                       // We only support Json and Form Post format
+                       errMessage = jsonNewMessage(AFB_FATAL, "Post Date wrong type encoding=%s != %s", encoding, JSON_CONTENT);
+                       goto ExitOnError;
+               }
+       }
+
+       // This time we receive partial/all Post data. Note that even if we get all POST data. We should nevertheless
+       // return MHD_YES and not process the request directly. Otherwise Libmicrohttpd is unhappy and fails with
+       // 'Internal application error, closing connection'.            
+       if (*upload_data_size) {
+
+               if (postHandle->type == AFB_POST_FORM) {
+                       // if (verbose) fprintf(stderr, "Processing PostForm[uid=%d]\n", postHandle->uid);
+                       MHD_post_process(postHandle->pp, upload_data, *upload_data_size);
+               }
+               // Process JsonPost request when buffer is completed let's call API    
+               if (postHandle->type == AFB_POST_JSON) {
+                       // if (verbose) fprintf(stderr, "Updating PostJson[uid=%d]\n", postHandle->uid);
+                       memcpy(&postHandle->privatebuf[postHandle->len], upload_data, *upload_data_size);
+                       postHandle->len = postHandle->len + *upload_data_size;
+               }
+
+               *upload_data_size = 0;
+               return MHD_YES;
+
+       } else {        // we have finish with Post reception let's finish the work
+
+               // Create a request structure to finalise the request
+               request = createRequest(connection, session, url);
+               if (request->jresp != NULL) {
+                       errMessage = request->jresp;
+                       goto ExitOnError;
+               }
+               postRequest.type = postHandle->type;
+
+               // Postform add application context handle to request
+               if (postHandle->type == AFB_POST_FORM) {
+                       postRequest.data = (char *)postHandle;
+                       request->post = &postRequest;
+               }
+
+               if (postHandle->type == AFB_POST_JSON) {
+                       // if (verbose) fprintf(stderr, "Processing PostJson[uid=%d]\n", postHandle->uid);
+
+                       param = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_CONTENT_LENGTH);
+                       if (param)
+                               sscanf(param, "%i", &contentlen);
+
+                       // At this level we're may verify that we got everything and process DATA
+                       if (postHandle->len != contentlen) {
+                               errMessage = jsonNewMessage(AFB_FATAL, "Post Data Incomplete UID=%d Len %d != %d", postHandle->uid, contentlen, postHandle->len);
+                               goto ExitOnError;
+                       }
+                       // Before processing data, make sure buffer string is properly ended
+                       postHandle->privatebuf[postHandle->len] = '\0';
+                       postRequest.data = postHandle->privatebuf;
+                       request->post = &postRequest;
+
+                       // if (verbose) fprintf(stderr, "Close Post[%d] Buffer=%s\n", postHandle->uid, request->post->data);
+               }
+       }
+
+ ProcessApiCall:
+       // Request is ready let's call API without any extra handle
+       status = findAndCallApi(request, NULL);
+
+       serialized = json_object_to_json_string(request->jresp);
+       webResponse = MHD_create_response_from_buffer(strlen(serialized), (void *)serialized, MHD_RESPMEM_MUST_COPY);
+
+       // client did not pass token on URI let's use cookies 
+       if ((!request->restfull) && (request->context != NULL)) {
+               char cookie[256];
+               snprintf(cookie, sizeof(cookie), "%s-%d=%s; Path=%s; Max-Age=%d; HttpOnly", COOKIE_NAME, request->config->httpdPort, request->uuid, request->config->rootapi, request->config->cntxTimeout);
+               MHD_add_response_header(webResponse, MHD_HTTP_HEADER_SET_COOKIE, cookie);
+       }
+       // if requested add an error status
+       if (request->errcode != 0)
+               ret = MHD_queue_response(connection, request->errcode, webResponse);
+       else
+               MHD_queue_response(connection, MHD_HTTP_OK, webResponse);
+
+       MHD_destroy_response(webResponse);
+       json_object_put(request->jresp);        // decrease reference rqtcount to free the json object
+       freeRequest(request);
+       return MHD_YES;
+
+ ExitOnError:
+       freeRequest(request);
+       serialized = json_object_to_json_string(errMessage);
+       webResponse = MHD_create_response_from_buffer(strlen(serialized), (void *)serialized, MHD_RESPMEM_MUST_COPY);
+       MHD_queue_response(connection, MHD_HTTP_BAD_REQUEST, webResponse);
+       MHD_destroy_response(webResponse);
+       json_object_put(errMessage);    // decrease reference rqtcount to free the json object
+       return MHD_YES;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+static int doRestApiGet(struct MHD_Connection *connection, AFB_session * session, const char *url, const char *method, const char *upload_data, size_t * upload_data_size, void **con_cls)
+{
+       AFB_error status;
+       struct MHD_Response *webResponse;
+       const char *serialized;
+       AFB_request *request = NULL;
+       int ret;
+
+       // fprintf (stderr, "doRestAPI method=%s posthandle=%p\n", method, con_cls);
+
+       // if post data may come in multiple calls
+       // this is a get we only need a request
+       request = createRequest(connection, session, url);
+
+       // Request is ready let's call API without any extra handle
+       status = findAndCallApi(request, NULL);
+
+       serialized = json_object_to_json_string(request->jresp);
+       webResponse = MHD_create_response_from_buffer(strlen(serialized), (void *)serialized, MHD_RESPMEM_MUST_COPY);
+
+       // client did not pass token on URI let's use cookies 
+       if ((!request->restfull) && (request->context != NULL)) {
+               char cookie[256];
+               snprintf(cookie, sizeof(cookie), "%s-%d=%s; Path=%s; Max-Age=%d; HttpOnly", COOKIE_NAME, request->config->httpdPort, request->uuid, request->config->rootapi, request->config->cntxTimeout);
+               MHD_add_response_header(webResponse, MHD_HTTP_HEADER_SET_COOKIE, cookie);
+       }
+       // if requested add an error status
+       if (request->errcode != 0)
+               ret = MHD_queue_response(connection, request->errcode, webResponse);
+       else
+               MHD_queue_response(connection, MHD_HTTP_OK, webResponse);
+
+       MHD_destroy_response(webResponse);
+       json_object_put(request->jresp);        // decrease reference rqtcount to free the json object
+       freeRequest(request);
+       return MHD_YES;
+}
+
+int doRestApi(struct MHD_Connection *connection, AFB_session * session, const char *url, const char *method, const char *upload_data, size_t * upload_data_size, void **con_cls)
+{
+       int rc;
+
+       if (afbJsonType == NULL)
+               afbJsonType = json_object_new_string (AFB_MSG_JTYPE);
+
+       if (0 == strcmp(method, MHD_HTTP_METHOD_POST)) {
+               rc = doRestApiPost(connection, session, url, method, upload_data, upload_data_size, con_cls);
+       } else {
+               rc = doRestApiGet(connection, session, url, method, upload_data, upload_data_size, con_cls);
+       }
+       return rc;
+}
+