Bonjour à tous,
J’essaie de récupérer, depuis une API, des données de transport de la RATP en temps réel.
J’ai des erreurs, donc j’ai uploader un code assez simple (modifié depuis un exemple), sur un NodeMCU:
#include <ESP8266WiFi.h>
// Wi-Fi Settings
const char* ssid = "xxxx";
const char* password = "xxxx";
String readString;
char serverName[] = "api-ratp.pierre-grimaud.fr"; // server's address
WiFiClient client;
//////////////////////
void setup(){
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
}
Serial.begin(9600);
Serial.println("client readString test 11/04/13"); // so I can keep track of what is loaded
Serial.println("Send an e in serial monitor to test"); // what to do to test
Serial.println();
}
void loop(){
// check for serial input
if (Serial.available() > 0) //if something in serial buffer
{
byte inChar; // sets inChar as a byte
inChar = Serial.read(); //gets byte from buffer
if(inChar == 'e') // checks to see byte is an e
{
sendGET(); // call sendGET function below when byte is an e
}
}
}
//////////////////////////
void sendGET() //client function to send/receive GET request data.
{
if (client.connect(serverName, 80)) { //starts client connection, checks for connection
Serial.println("connected");
client.println("GET /v3/schedules/bus/96/porte+des+lilas+metro/R?_format=json HTTP/1.1"); //download text
client.println("Host: api-ratp.pierre-grimaud.fr");
client.println("Content-Type: text/plain");
client.println("Connection: close"); //close 1.1 persistent connection
client.println(); //end of get request
}
else {
Serial.println("connection failed"); //error message if no client connect
Serial.println();
}
while(client.connected() && !client.available()) delay(1); //waits for data
while (client.connected() || client.available()) { //connected or data available
char c = client.read(); //gets byte from ethernet buffer
readString += c; //places captured byte in readString
}
//Serial.println();
client.stop(); //stop client
Serial.println("client disconnected.");
Serial.println("Data from server captured in readString:");
Serial.println();
Serial.print(readString); //prints readString to serial monitor
Serial.println();
Serial.println();
Serial.println("End of readString");
Serial.println("==================");
Serial.println();
readString=""; //clear readString variable
}
Le problème est que dans la console, je reçois un bout de page HTML :
client readString test 11/04/13
Send an e in serial monitor to test
connected
client disconnected.
Data from server captured in readString:
HTTP/1.1 301 Moved Permanently
Date: Tue, 02 May 2017 15:00:23 GMT
Server: Apache/2.4.10 (Debian)
Location: https://api-ratp.pierre-grimaud.fr/v3/schedules/bus/96/porte+des+lilas+metro/R?_format=xml
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8
25c
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<meta http-equiv="refresh" content="1;url=https://api-ratp.pierre-grimaud.fr/v3/schedules/bus/96/porte+des+lilas+metro/R?_format=xml" />
<title>Redirecting to https://api-ratp.pierre-grimaud.fr/v3/schedules/bus/96/porte+des+lilas+metro/R?_format=xml</title>
</head>
<body>
Redirecting to <a href="https://api-ratp.pierre-grimaud.fr/v3/schedules/bus/96/porte+des+lilas+metro/R?_format=xml">https://api-ratp.pierre-grimaud.fr/v3/schedules/bus/96/porte+des+lilas+metro/R?_format=xml</a>.
</body>
</html>
0
End of readString
==================
Et non pas un JSON, comme cela apparaît avec une requête dans un navigateur:
https://api-ratp.pierre-grimaud.fr/v3/schedules/bus/96/porte+des+lilas+metro/R?_format=json
Qui donne :
{
"result": {
"schedules": [
{
"message": "0 mn",
"destination": "Porte des Lilas"
},
{
"message": "3 mn",
"destination": "Porte des Lilas"
}
]
},
"_metadata": {
"call": "GET /schedules/bus/96/porte+des+lilas+metro/R",
"date": "2017-05-02T17:01:51+02:00",
"version": 3
}
}
Pourtant cette requête marche sur des exemples de JSON en ligne, comme https://jsonplaceholder.typicode.com/comments?postId=1 par exemple.
Avez vous une idée du problème ? Est ce que c’est le format du JSON sur le site api-ratp.pierre-grimaud.fr ? ou faut-il rajouter des requêtes dans le “GET” ?
Merci d’avance !
baba
