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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/>.
*
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
/*
#include <dirent.h>
#include <sys/stat.h>
#include <sys/types.h>
*/
#include "local-def.h"
#include "afb-req-itf.h"
// handle to hold queryAll values
typedef struct {
char *msg;
size_t idx;
size_t len;
} queryHandleT;
// Error code are requested through function to manage json usage count
typedef struct {
int level;
const char* label;
json_object *json;
} AFB_errorT;
static AFB_errorT AFBerr [AFB_UNAUTH+1];
static json_object *jTypeStatic;
PUBLIC int verbose;
static const char *ERROR_LABEL[] = {"false", "true", "fatal", "fail", "warning", "empty", "success", "done", "unauth"};
// Helper to retrieve argument from connection
const char* getQueryValue(const AFB_request * request, const char *name) {
return afb_req_argument(*request->areq, name);
}
static int getQueryCB (queryHandleT *query, struct afb_arg arg) {
if (query->idx >= query->len)
return 0;
query->idx += (unsigned)snprintf (&query->msg[query->idx], query->len-query->idx, " %s: %s\'%s\',", arg.name, arg.is_file?"FILE=":"", arg.value);
return 1; /* continue to iterate */
}
// Helper to retrieve argument from connection
size_t 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;
afb_req_iterate(*request->areq, (void*)getQueryCB, &query);
buffer[len-1] = 0;
return query.idx >= len ? len - 1 : query.idx;
}
#if 0
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);
}
json_object* getPostFile (AFB_request *request, AFB_PostItem *item, char* destination) {
AFB_PostHandle *postHandle = getPostHandle(request);
AFB_PostCtx *postFileCtx;
char filepath[512];
ssize_t 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);
}
#if defined(PLEASE_FIX_ME_THE_ERROR_IS_postFileCtx_NOT_INITIALIZED)
// 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;
}
#endif
// 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 (mkdir(filepath,O_RDWR | S_IRWXU | S_IRGRP) < 0) {
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 ((ssize_t)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;
}
#endif
static void jsoninit()
{
int idx, verbosesav;
if (jTypeStatic)
return;
// initialise JSON constant messages and increase reference count to make them permanent
verbosesav = verbose;
verbose = 0; // run initialisation in silent mode
jTypeStatic = json_object_new_string ("AFB_message");
for (idx = 0; idx <= AFB_UNAUTH; idx++) {
AFBerr[idx].level = idx;
AFBerr[idx].label = ERROR_LABEL [idx];
AFBerr[idx].json = jsonNewMessage (idx, NULL);
}
verbose = verbosesav;
}
// build an ERROR message and return it as a valid json object
json_object *json_add_status (json_object *obj, const char *status, const char *info)
{
if (obj == NULL)
obj = json_object_new_object();
json_object_object_add(obj, "status", json_object_new_string(status));
if (info)
json_object_object_add(obj, "info", json_object_new_string(info));
return obj;
}
// build an ERROR message and return it as a valid json object
json_object *json_add_status_v (json_object *obj, const char *status, const char *info, va_list args)
{
char *message;
if (info == NULL || vasprintf(&message, info, args) < 0)
message = NULL;
obj = json_add_status(obj, status, message);
free(message);
return obj;
}
// build an ERROR message and return it as a valid json object
json_object *json_add_status_f (json_object *obj, const char *status, const char *info, ...)
{
va_list args;
va_start(args, info);
obj = json_add_status_v(obj, status, info, args);
va_end(args);
return obj;
}
// build an ERROR message and return it as a valid json object
struct json_object *jsonNewMessage (AFB_error level, char* format, ...) {
static int count = 0;
json_object * AFBResponse;
va_list args;
char message [512];
jsoninit();
// format message
if (format != NULL) {
va_start(args, format);
vsnprintf (message, sizeof (message), format, args);
va_end(args);
}
AFBResponse = json_object_new_object();
json_object_object_add (AFBResponse, "jtype", json_object_get (jTypeStatic));
json_object_object_add (AFBResponse, "status" , json_object_new_string (ERROR_LABEL[level]));
if (format != NULL) {
json_object_object_add (AFBResponse, "info" , json_object_new_string (message));
}
if (verbose) {
fprintf (stderr, "AFB:%-6s [%3d]: ", AFBerr [level].label, count++);
if (format != NULL) {
fprintf (stderr, "%s", message);
} else {
fprintf (stderr, "No Message");
}
fprintf (stderr, "\n");
}
return (AFBResponse);
}
#if 0
{
jtype: "AFB_message"
request:
{
prefix: "",
api: "",
status: "", /* exist, fail, empty, null, processed */
info: "",
uuid: "",
token: "",
timeout: ""
}
response: ...
}
#endif
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