I'm trying to implement this library, parson , in C, but when I try to manipulate the data obtained via connection socket (SO link) , I get a null , which does not happen when I manually put json in C.
The problem is in the socket response, which is not received correctly, because in the android logcat everything before the answer is deleted, leaving a blank field.
Below is all the function used to get a response from the server.
#include "HttpGet.h"
#include <android/log.h>
#include <stdio.h> /* printf, sprintf */
#include <stdlib.h> /* exit, atoi, malloc, free */
#include <unistd.h> /* read, write, close */
#include <string.h> /* memcpy, memset */
#include <sys/socket.h> /* socket, connect */
#include <netdb.h> /* struct hostent, gethostbyname */
#include <netinet/in.h> /* struct sockaddr_in, struct sockaddr */
#include "parson.h" // JSON
int HttpGetPost(char *webserver,const char *url)
{
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-------", "Enter HttpGet function!");
char* argva = "?tokenweb=meuapp";
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-------", "Enter argvs %s ",argva);
int argc = 5;
char* argv[7];
argv[1] = "127.0.0.1";
argv[2] = "80";
argv[3] = "GET"; //POST //GET
argv[4] = "/testmobile.php";
argv[5] = "?tokenweb=meuapp";
argv[6] = "";
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-------", "Enter argv2 %s ",argv[4]);
int i;
struct hostent *server;
struct sockaddr_in serv_addr;
int bytes, sent, received, total, message_size;
char *message, response[4096];
int portno = atoi(argv[2])>0?atoi(argv[2]):80;
char *host = strlen(argv[1])>0?argv[1]:"localhost";
char *path = strlen(argv[4])>0?argv[4]:"/";
if (argc < 5) { puts("Parameters: <host> <port> <method> <path> [<data> [<headers>]]"); exit(0); }
/* How big is the message? */
message_size=0;
if(!strcmp(argv[3],"GET"))
{
printf("Process 1\n");
message_size+=strlen("%s %s%s%s HTTP/1.0\r\nHost: %s\r\n"); /* method */
message_size+=strlen(argv[3]); /* path */
message_size+=strlen(path); /* headers */
if(argc>5)
message_size+=strlen(argv[5]); /* query string */
for(i=6;i<argc;i++) /* headers */
message_size+=strlen(argv[i])+strlen("\r\n");
message_size+=strlen("\r\n"); /* blank line */
}
else
{
printf("Process 2\n");
message_size+=strlen("%s %s HTTP/1.0\r\nHost: %s\r\n");
message_size+=strlen(argv[3]); /* method */
message_size+=strlen(path); /* path */
for(i=6;i<argc;i++) /* headers */
message_size+=strlen(argv[i])+strlen("\r\n");
if(argc>5)
message_size+=strlen("Content-Length: %d\r\n")+10; /* content length */
message_size+=strlen("\r\n"); /* blank line */
if(argc>5)
message_size+=strlen(argv[5]); /* body */
}
printf("Allocating...\n");
/* allocate space for the message */
//message=malloc(message_size); //original
message=malloc(1024);
/* fill in the parameters */
if(!strcmp(argv[3],"GET"))
{
if(argc>5)
sprintf(message,"%s %s%s%s HTTP/1.0\r\nHost: %s\r\n",
strlen(argv[3])>0?argv[3]:"GET", /* method */
path, /* path */
strlen(argv[5])>0?"?":"", /* ? */
strlen(argv[5])>0?argv[5]:"",host); /* query string */
else
sprintf(message,"%s %s HTTP/1.0\r\nHost: %s\r\n",
strlen(argv[3])>0?argv[3]:"GET", /* method */
path,host); /* path */
for(i=6;i<argc;i++) /* headers */
{strcat(message,argv[i]);strcat(message,"\r\n");}
strcat(message,"\r\n"); /* blank line */
}
else
{
sprintf(message,"%s %s HTTP/1.0\r\nHost: %s\r\n",
strlen(argv[3])>0?argv[3]:"POST", /* method */
path,host); /* path */
for(i=6;i<argc;i++) /* headers */
{strcat(message,argv[i]);strcat(message,"\r\n");}
if(argc>5)
sprintf(message+strlen(message),"Content-Length: %d\r\n",(int)strlen(argv[5]));
strcat(message,"\r\n"); /* blank line */
if(argc>5)
strcat(message,argv[5]); /* body */
}
printf("Processed\n");
/* What are we going to send? */
printf("Request:\n%s\n",message);
/* lookup the ip address */
total = strlen(message);
/* create the socket */
int sockfd;
server = gethostbyname(host);
if (server == NULL) {
error("ERROR, no such host");
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-------", "ERROR, no such host");
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) {
error("ERROR opening socket");
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-------", "ERROR opening socket");
}
/* fill in the structure */
memset(&serv_addr,0,sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(portno);
memcpy(&serv_addr.sin_addr.s_addr,server->h_addr,server->h_length);
/* connect the socket */
if (connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) < 0) {
error("ERROR connecting");
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-------", "ERROR connecting");
}
/* send the request */
sent = 0;
do {
bytes = write(sockfd,message+sent,total-sent);
if (bytes < 0)
error("ERROR writing message to socket");
if (bytes == 0)
break;
sent+=bytes;
} while (sent < total);
/* receive the response */
memset(response, 0, sizeof(response));
total = sizeof(response)-1;
received = 0;
printf("Response: \n");
/*
do {
printf("%s", response);
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-------", "Response: \n %s", response);
//strcat(json_response, response);
//strcpy(json_response, response);
json_response = response;
memset(response, 0, sizeof(response));
bytes = recv(sockfd, response, 1024, 0);
if (bytes < 0)
printf("ERROR reading response from socket");
if (bytes == 0)
break;
received+=bytes;
} while (1);
*/
do {
bytes = read(sockfd,response+received,total-received);
__android_log_print(ANDROID_LOG_INFO, "---from--jni-RN---", "Response: %s", response);
if (bytes < 0)
error("ERROR reading response from socket");
if (bytes == 0)
break;
received+=bytes;
} while (received < total);
if (received == total)
error("ERROR storing complete response from socket");
//__android_log_print(ANDROID_LOG_INFO, "-----from--jni-------", "Response2: \n %s", response);
//============ Verificação de Segurança =================================================//
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-1-----", "Response: \"%s\"", response); // = {"message":"success"}"
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-1a-----", "Response: '%s'", response);
JSON_Value *user_data = json_parse_string(response);
const char *msgs = json_object_get_string(json_object(user_data), "message");
//Auth HashCode
// __android_log_print(ANDROID_LOG_INFO, "-----from--jni-------", "Response Compare: \n [%s]", name );
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-1-----", "Json Message 1. [%s] ", msgs);
//__android_log_print(ANDROID_LOG_INFO, "-----from--jni-2-----", "Signature Auth 2. [%s] \n",signature);
//Auth PackageName
char text[100] = "{\"key\": \"valor\"}";
JSON_Value *data = json_parse_string(text);
const char *sdata = json_object_get_string(json_object(data), "key");
__android_log_print(ANDROID_LOG_INFO, "-----from--jni-1-----", "Json Key 1. [%s] \n", sdata);
/* close the socket */
close(sockfd);
free(message);
return 0;
}
Running the above code I get the following message in logcat.
com.dou361.ijkplayer_simple.example I/-----from--jni-------: Enter mmain function!
com.dou361.ijkplayer_simple.example I/-----from--jni-------: Enter HttpGet function!
com.dou361.ijkplayer_simple.example I/-----from--jni-------: Enter argvs ?tokenweb=meuapp
com.dou361.ijkplayer_simple.example I/-----from--jni-------: Enter argv2 /testmobile.php
testando_msg
testando_msg
testando_msg"
testando_msg'
com.dou361.ijkplayer_simple.example I/-----from--jni-1-----: Json Message 1. [(null)]
com.dou361.ijkplayer_simple.example I/-----from--jni-1-----: Json Key 1. [valor]
Picture
How can I receive this answer correctly?
Such as com.dou361.ijkplayer_simple.example I/-----from--jni-1-----: Json Message [testando_msg] .