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/*
* Copyright (C) 2015 "IoT.bzh"
* Author "Fulup Ar Foll"
*
* 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/>.
*
*/
#include "../include/local-def.h"
#include <dirent.h>
// handle to hold queryAll values
typedef struct {
char *msg;
int idx;
size_t len;
} queryHandleT;
// Sample Generic Ping Debug API
PUBLIC json_object* getPingTest(AFB_request *request) {
static pingcount = 0;
json_object *response;
char query [256];
char session[256];
int len;
// request all query key/value
len = getQueryAll (request, query, sizeof(query));
if (len == 0) strncpy (query, "NoSearchQueryList", sizeof(query));
// check if we have some post data
if (request->post == NULL) request->post->data="NoData";
// return response to caller
response = jsonNewMessage(AFB_SUCCESS, "Ping Binder Daemon count=%d uuid=%s query={%s} session={0x%x} PostData: [%s] "
, pingcount++, request->uuid, query, session, request->post->data);
return (response);
}
// Helper to retrieve argument from connection
PUBLIC const char* getQueryValue(const AFB_request * request, const char *name) {
const char *value;
value = MHD_lookup_connection_value(request->connection, MHD_GET_ARGUMENT_KIND, name);
return (value);
}
STATIC int getQueryCB (void*handle, enum MHD_ValueKind kind, const char *key, const char *value) {
queryHandleT *query = (queryHandleT*)handle;
query->idx += snprintf (&query->msg[query->idx],query->len," %s: \'%s\',", key, value);
}
// Helper to retrieve argument from connection
PUBLIC int getQueryAll(AFB_request * request, char *buffer, size_t len) {
queryHandleT query;
buffer[0] = '\0'; // start with an empty string
query.msg= buffer;
query.len= len;
query.idx= 0;
MHD_get_connection_values (request->connection, MHD_GET_ARGUMENT_KIND, getQueryCB, &query);
return (len);
}
// Helper to retrieve POST handle
PUBLIC AFB_PostHandle* getPostHandle (AFB_request *request) {
if (request->post == NULL) return (NULL);
return ((AFB_PostHandle*) request->post->data);
}
// Helper to retrieve POST file context
PUBLIC AFB_PostCtx* getPostContext (AFB_request *request) {
AFB_PostHandle* postHandle;
if (request->post == NULL) return (NULL);
postHandle = (AFB_PostHandle*) request->post->data;
if (postHandle == NULL) return NULL;
return ((AFB_PostCtx*) postHandle->ctx);
}
PUBLIC char* getPostPath (AFB_request *request) {
AFB_PostHandle *postHandle = getPostHandle(request);
AFB_PostCtx *postFileCtx;
if (postHandle == NULL) return NULL;
postFileCtx = (AFB_PostCtx*) postHandle->ctx;
if (postFileCtx == NULL) return NULL;
return (postFileCtx->path);
}
PUBLIC json_object* getPostFile (AFB_request *request, AFB_PostItem *item, char* destination) {
AFB_PostHandle *postHandle = getPostHandle(request);
AFB_PostCtx *postFileCtx;
char filepath[512];
int len;
// This is called after PostForm and then after DonePostForm
if (item == NULL) {
json_object* jresp;
postFileCtx = (AFB_PostCtx*) postHandle->ctx;
// No Post Application Context [something really bad happen]
if (postFileCtx == NULL) {
request->errcode = MHD_HTTP_EXPECTATION_FAILED;
return(jsonNewMessage(AFB_FAIL,"Error: PostForm no PostContext to free\n"));
}
// We have a context but last Xform iteration fail or application set a message
if (request->jresp != NULL) {
jresp = request->jresp; // retrieve previous error from postCtx
} else jresp = jsonNewMessage(AFB_SUCCESS,"getPostFile Post Request done");
// Error or not let's free all resources
close(postFileCtx->fd);
free (postFileCtx->path);
free (postFileCtx);
return (jresp);
}
// Make sure it's a valid PostForm request
if (!request->post && request->post->type != AFB_POST_FORM) {
postFileCtx->jresp= jsonNewMessage(AFB_FAIL,"This is not a valid PostForm request\n");
goto ExitOnError;
}
// Check this is a file element
if (item->filename == NULL) {
postFileCtx->jresp= jsonNewMessage(AFB_FAIL,"No Filename attached to key=%s\n", item->key);
goto ExitOnError;
}
// Check we got something in buffer
if (item->len <= 0) {
postFileCtx->jresp= jsonNewMessage(AFB_FAIL,"Buffer size NULL key=%s]\n", item->key);
goto ExitOnError;
}
// Extract Application Context from posthandle [NULL == 1st iteration]
postFileCtx = (AFB_PostCtx*) postHandle->ctx;
// This is the 1st Item iteration let's open output file and allocate necessary resources
if (postFileCtx == NULL) {
DIR* destDir;
// Create an application specific context
postFileCtx = calloc (1, sizeof(AFB_PostCtx)); // May place anything here until post->completeCB handle resources liberation
// attach application to postHandle
postHandle->ctx = (void*) postFileCtx; // May place anything here until post->completeCB handle resources liberation
// Build destination directory full path
if (destination[0] != '/') {
strncpy (filepath, request->config->sessiondir, sizeof(filepath));
strncat (filepath, "/", sizeof(filepath));
strncat (filepath, destination, sizeof(filepath));
} else strncpy (filepath, destination, sizeof(filepath));
// make sure destination directory exist
destDir = opendir (filepath);
if (destDir == NULL) {
if ( 0 <= mkdir(filepath,O_RDWR | S_IRWXU | S_IRGRP)) {
postFileCtx->jresp= jsonNewMessage(AFB_FAIL,"Fail to Create destination directory=[%s] error=%s\n", filepath, strerror(errno));
goto ExitOnError;
}
} else closedir (destDir);
strncat (filepath, "/", sizeof(filepath));
strncat (filepath, item->filename, sizeof(filepath));
postFileCtx->path = strdup (filepath);
if (verbose) fprintf(stderr, "getPostFile path=%s\n", filepath);
if((postFileCtx->fd = open(filepath, O_RDWR |O_CREAT, S_IRWXU|S_IRGRP)) <= 0) {
postFileCtx->jresp= jsonNewMessage(AFB_FAIL,"Fail to Create destination File=[%s] error=%s\n", filepath, strerror(errno));
goto ExitOnError;
}
} else {
// reuse existing application context
postFileCtx = (AFB_PostCtx*) postHandle->ctx;
}
// Check we successfully wrote full buffer
len = write (postFileCtx->fd, item->data, item->len);
if (item->len != len) {
postFileCtx->jresp= jsonNewMessage(AFB_FAIL,"Fail to write file [%s] at [%s] error=\n", item->filename, strerror(errno));
goto ExitOnError;
}
// every intermediary iteration should return Success & NULL
request->errcode = MHD_HTTP_OK;
return NULL;
ExitOnError:
request->errcode = MHD_HTTP_EXPECTATION_FAILED;
return NULL;
}
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