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I’m trying to implement this library, Parson, in C, but when I try to manipulate the data obtained via connection socket(ONLY link), I get a null, what doesn’t happen when I manually put the json in the C.
The problem is in the socket response, which is not received correctly, because in the android logcat everything before the answer is deleted, getting a blank field.
Below is the entire 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]
Imagery
How could I receive that answer correctly?
For example com.dou361.ijkplayer_simple.example I/-----from--jni-1-----: Json Message [testando_msg].
Sorry for the mess, they were many attempts, the answer comes, but it comes like this, with problems, and ends up serving for nothing.
– Florida
The question has already been solved, any answers that are better than mine, or contain detailed explanations of each function and/or other ways to achieve what is desired here are welcome and can take the 50 dots.
– Florida