SyntaxError-SyntaxError：JSON中位置1上的意外令牌<-Ionic
[英]SyntaxError - SyntaxError: Unexpected token < in JSON at position 1 - Ionic
问题描述
When I push my data to my database, I get back a problem with my JSON: 
当我将数据推送到数据库时，我遇到了JSON问题：
1
<br/>mail@mail.comhere{"userData": {"user_id":"21","name":"eman","email":"mail@mail.com","username":"username_name","token":"6de6b72ad590562b566675f6f780cb26cf67dc46e73cf025ad5ef7da92735b45"}}
Seems I get back html and not JSON data, the following error: 似乎我取回html而不是JSON数据，出现以下错误：
SyntaxError: Unexpected token < in JSON at position 1
at JSON.parse (<anonymous>)
at Response.Body.json (http://localhost:8106/build/vendor.js:71523:25)
at SafeSubscriber._next (http://localhost:8106/build/main.js:757:29)
at SafeSubscriber.__tryOrUnsub (http://localhost:8106/build/vendor.js:38232:16)
at SafeSubscriber.next (http://localhost:8106/build/vendor.js:38179:22)
at Subscriber._next (http://localhost:8106/build/vendor.js:38119:26)
at Subscriber.next (http://localhost:8106/build/vendor.js:38083:18)
at XMLHttpRequest.onLoad (http://localhost:8106/build/vendor.js:72016:38)
at t.invokeTask (http://localhost:8106/build/polyfills.js:3:15660)
at Object.onInvokeTask (http://localhost:8106/build/vendor.js:4974:33)
Here is my API Code: 这是我的API代码：
postData(credentials, type){
return new Promise((resolve, reject) =>{
let headers = new Headers();
this.http.post(apiUrl+type, JSON.stringify(credentials), {headers: headers}).
subscribe(res =>{
resolve(res.json());
}, (err) =>{
reject(err);
});
I spent whole day trying to find a solution, check every post on SO but still can not find solution. 我花了一整天的时间来寻找解决方案，检查SO上的每个帖子，但仍然找不到解决方案。 It may be a duplicate post but honestly I did not see the answer on other posts. 这可能是重复的帖子，但老实说我没有在其他帖子上看到答案。
--edit-- webapi --edit-- webapi
<?php
require 'config.php';
require 'Slim/Slim.php';
\Slim\Slim::registerAutoloader();
$app = new \Slim\Slim();
$app->post('/login','login'); /* User login */
$app->post('/signup','signup'); /* User Signup */
$app->get('/getFeed','getFeed'); /* User Feeds */
$app->post('/feed','feed'); /* User Feeds */
$app->post('/feedUpdate','feedUpdate'); /* User Feeds */
$app->post('/feedDelete','feedDelete'); /* User Feeds */
$app->post('/getImages', 'getImages');
$app->run();
/************************* USER LOGIN *************************************/
/* ### User login ### */
function login() {
$request = \Slim\Slim::getInstance()->request();
$data = json_decode($request->getBody());
try {
$db = getDB();
$userData ='';
$sql = "SELECT user_id, name, email, username FROM users WHERE (username=:username or email=:username) and password=:password ";
$stmt = $db->prepare($sql);
$stmt->bindParam("username", $data->username, PDO::PARAM_STR);
$password=hash('sha256',$data->password);
$stmt->bindParam("password", $password, PDO::PARAM_STR);
$stmt->execute();
$mainCount=$stmt->rowCount();
$userData = $stmt->fetch(PDO::FETCH_OBJ);
if(!empty($userData))
{
$user_id=$userData->user_id;
$userData->token = apiToken($user_id);
}
$db = null;
if($userData){
$userData = json_encode($userData);
echo '{"userData": ' .$userData . '}';
} else {
echo '{"error":{"text":"Bad request wrong username and password"}}';
}
}
catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
/* ### User registration ### */
function signup() {
$request = \Slim\Slim::getInstance()->request();
$data = json_decode($request->getBody());
$email=$data->email;
$name=$data->name;
$username=$data->username;
$password=$data->password;
try {
$username_check = preg_match('~^[A-Za-z0-9_]{3,20}$~i', $username);
$email_check = preg_match('~^[a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.([a-zA-Z]{2,4})$~i', $email);
$password_check = preg_match('~^[A-Za-z0-9!@#$%^&*()_]{6,20}$~i', $password);
echo $email_check.'<br/>'.$email;
if (strlen(trim($username))>0 && strlen(trim($password))>0 && strlen(trim($email))>0 && $email_check>0 && $username_check>0 && $password_check>0)
{
echo 'here';
$db = getDB();
$userData = '';
$sql = "SELECT user_id FROM users WHERE username=:username or email=:email";
$stmt = $db->prepare($sql);
$stmt->bindParam("username", $username,PDO::PARAM_STR);
$stmt->bindParam("email", $email,PDO::PARAM_STR);
$stmt->execute();
$mainCount=$stmt->rowCount();
$created=time();
if($mainCount==0)
{
/*Inserting user values*/
$sql1="INSERT INTO users(username,password,email,name)VALUES(:username,:password,:email,:name)";
$stmt1 = $db->prepare($sql1);
$stmt1->bindParam("username", $username,PDO::PARAM_STR);
$password=hash('sha256',$data->password);
$stmt1->bindParam("password", $password,PDO::PARAM_STR);
$stmt1->bindParam("email", $email,PDO::PARAM_STR);
$stmt1->bindParam("name", $name,PDO::PARAM_STR);
$stmt1->execute();
$userData=internalUserDetails($email);
}
$db = null;
if($userData){
$userData = json_encode($userData);
echo '{"userData": ' .$userData . '}';
} else {
echo '{"error":{"text":"Enter valid data"}}';
}
}
else{
echo '{"error":{"text":"Enter valid data"}}';
}
}
catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
function email() {
$request = \Slim\Slim::getInstance()->request();
$data = json_decode($request->getBody());
$email=$data->email;
try {
$email_check = preg_match('~^[a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.([a-zA-Z]{2,4})$~i', $email);
if (strlen(trim($email))>0 && $email_check>0)
{
$db = getDB();
$userData = '';
$sql = "SELECT user_id FROM emailUsers WHERE email=:email";
$stmt = $db->prepare($sql);
$stmt->bindParam("email", $email,PDO::PARAM_STR);
$stmt->execute();
$mainCount=$stmt->rowCount();
$created=time();
if($mainCount==0)
{
/*Inserting user values*/
$sql1="INSERT INTO emailUsers(email)VALUES(:email)";
$stmt1 = $db->prepare($sql1);
$stmt1->bindParam("email", $email,PDO::PARAM_STR);
$stmt1->execute();
}
$userData=internalEmailDetails($email);
$db = null;
if($userData){
$userData = json_encode($userData);
echo '{"userData": ' .$userData . '}';
} else {
echo '{"error":{"text":"Enter valid dataaaa"}}';
}
}
else{
echo '{"error":{"text":"Enter valid data"}}';
}
}
catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
/* ### internal Username Details ### */
function internalUserDetails($input) {
try {
$db = getDB();
$sql = "SELECT user_id, name, email, username FROM users WHERE username=:input or email=:input";
$stmt = $db->prepare($sql);
$stmt->bindParam("input", $input,PDO::PARAM_STR);
$stmt->execute();
$usernameDetails = $stmt->fetch(PDO::FETCH_OBJ);
$usernameDetails->token = apiToken($usernameDetails->user_id);
$db = null;
return $usernameDetails;
} catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
function getFeed(){
try {
if(1){
$feedData = '';
$db = getDB();
$sql = "SELECT * FROM feed ORDER BY feed_id DESC LIMIT 15";
$stmt = $db->prepare($sql);
$stmt->bindParam("user_id", $user_id, PDO::PARAM_INT);
$stmt->bindParam("lastCreated", $lastCreated, PDO::PARAM_STR);
$stmt->execute();
$feedData = $stmt->fetchAll(PDO::FETCH_OBJ);
$db = null;
if($feedData)
echo '{"feedData": ' . json_encode($feedData) . '}';
else
echo '{"feedData": ""}';
} else{
echo '{"error":{"text":"No access"}}';
}
} catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
function feed(){
$request = \Slim\Slim::getInstance()->request();
$data = json_decode($request->getBody());
$user_id=$data->user_id;
$token=$data->token;
$lastCreated = $data->lastCreated;
$systemToken=apiToken($user_id);
try {
if($systemToken == $token){
$feedData = '';
$db = getDB();
if($lastCreated){
$sql = "SELECT * FROM feed WHERE user_id_fk=:user_id AND created < :lastCreated ORDER BY feed_id DESC LIMIT 5";
$stmt = $db->prepare($sql);
$stmt->bindParam("user_id", $user_id, PDO::PARAM_INT);
$stmt->bindParam("lastCreated", $lastCreated, PDO::PARAM_STR);
}
else{
$sql = "SELECT * FROM feed WHERE user_id_fk=:user_id ORDER BY feed_id DESC LIMIT 5";
$stmt = $db->prepare($sql);
$stmt->bindParam("user_id", $user_id, PDO::PARAM_INT);
}
$stmt->execute();
$feedData = $stmt->fetchAll(PDO::FETCH_OBJ);
$db = null;
if($feedData)
echo '{"feedData": ' . json_encode($feedData) . '}';
else
echo '{"feedData": ""}';
} else{
echo '{"error":{"text":"No access"}}';
}
} catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
function feedUpdate(){
$request = \Slim\Slim::getInstance()->request();
$data = json_decode($request->getBody());
$user_id=$data->user_id;
$token=$data->token;
$feed=$data->feed;
$systemToken=apiToken($user_id);
try {
if($systemToken == $token){
$feedData = '';
$db = getDB();
$sql = "INSERT INTO feed ( feed, created, user_id_fk) VALUES (:feed,:created,:user_id)";
$stmt = $db->prepare($sql);
$stmt->bindParam("feed", $feed, PDO::PARAM_STR);
$stmt->bindParam("user_id", $user_id, PDO::PARAM_INT);
$created = time();
$stmt->bindParam("created", $created, PDO::PARAM_INT);
$stmt->execute();
$sql1 = "SELECT * FROM feed WHERE user_id_fk=:user_id ORDER BY feed_id DESC LIMIT 1";
$stmt1 = $db->prepare($sql1);
$stmt1->bindParam("user_id", $user_id, PDO::PARAM_INT);
$stmt1->execute();
$feedData = $stmt1->fetch(PDO::FETCH_OBJ);
$db = null;
echo '{"feedData": ' . json_encode($feedData) . '}';
} else{
echo '{"error":{"text":"No access"}}';
}
} catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
function feedDelete(){
$request = \Slim\Slim::getInstance()->request();
$data = json_decode($request->getBody());
$user_id=$data->user_id;
$token=$data->token;
$feed_id=$data->feed_id;
$systemToken=apiToken($user_id);
try {
if($systemToken == $token){
$feedData = '';
$db = getDB();
$sql = "Delete FROM feed WHERE user_id_fk=:user_id AND feed_id=:feed_id";
$stmt = $db->prepare($sql);
$stmt->bindParam("user_id", $user_id, PDO::PARAM_INT);
$stmt->bindParam("feed_id", $feed_id, PDO::PARAM_INT);
$stmt->execute();
$db = null;
echo '{"success":{"text":"Feed deleted"}}';
} else{
echo '{"error":{"text":"No access"}}';
}
} catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
$app->post('/userImage','userImage'); /* User Details */
function userImage(){
$request = \Slim\Slim::getInstance()->request();
$data = json_decode($request->getBody());
$user_id=$data->user_id;
$token=$data->token;
$imageB64=$data->imageB64;
$systemToken=apiToken($user_id);
try {
if(1){
$db = getDB();
$sql = "INSERT INTO imagesData(b64,user_id_fk) VALUES(:b64,:user_id)";
$stmt = $db->prepare($sql);
$stmt->bindParam("user_id", $user_id, PDO::PARAM_INT);
$stmt->bindParam("b64", $imageB64, PDO::PARAM_STR);
$stmt->execute();
$db = null;
echo '{"success":{"status":"uploaded"}}';
} else{
echo '{"error":{"text":"No access"}}';
}
} catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
$app->post('/getImages', 'getImages');
function getImages(){
$request = \Slim\Slim::getInstance()->request();
$data = json_decode($request->getBody());
$user_id=$data->user_id;
$token=$data->token;
$systemToken=apiToken($user_id);
try {
if(1){
$db = getDB();
$sql = "SELECT b64 FROM imagesData";
$stmt = $db->prepare($sql);
$stmt->execute();
$imageData = $stmt->fetchAll(PDO::FETCH_OBJ);
$db = null;
echo '{"imageData": ' . json_encode($imageData) . '}';
} else{
echo '{"error":{"text":"No access"}}';
}
} catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
?>
3 个解决方案
解决方案1
1 2017-12-29 10:12:30
在注册功能中，您必须删除以下行：
echo $email_check.'<br/>'.$email;
解决方案2
1 已采纳 2017-12-29 10:21:01
Problem is in signUp() function, two times unwanted echo are there, 问题出在signUp（）函数中，有两次不必要的回声，
echo $email_check.'<br/>'.$email; // remove this unwanted stuff
if (strlen(trim($username))>0 && strlen(trim($password))>0 && strlen(trim($email))>0 && $email_check>0 && $username_check>0 && $password_check>0)
{
echo 'here'; // remove this unwanted stuff
....
echo $email_check.'<br/>'.$email; remove this unwanted stuff 删除不需要的东西
echo 'here'; remove this unwanted stuff 删除不需要的东西
解决方案3
0 2018-07-09 06:05:27
I resolve this problem by removing platform (ie ionic platform rm android ). 我通过删除平台（即ionic平台rm android）解决了这个问题。 And add platform (ie ionic platform add android ) again. 并再次添加平台（即ionic平台添加android）。
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