批准net json返回额外字符

Question

我有这个密码

$ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_HTTPHEADER, Array("'Content-Type: application/json; charset=utf-8'"));
  curl_setopt($ch, CURLOPT_HEADER, 0);
  curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data_str));
  curl_setopt($ch, CURLOPT_POST, 1);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
  $xmlresult = curl_exec($ch);
  $xmlError = $xmlresult;
  $json = json_decode($xmlresult, true);

我将答案转换为json，但无法转换，因为开头的答案是，额外字符请参见示例

п»ї{"customerPaymentProfileIdList":[],"customerShippingAddressIdList":[],"validationDirectResponseList":[],"messages":{"resultCode":"Error","message":[{"code":"E00039","text":"A duplicate record with ID 39223758 already exists."}]}}

响应标头

HTTP/1.1 200 OK缓存控制：私有内容长度：232内容类型：应用程序/json；charset=utf-8服务器：Microsoft IIS/7.5 X-AspNet-Version:2.0.50727 X-Powered-By:ASP。NET访问控制允许来源：*访问控制允许方法：PUT、OPTIONS、POST、GET访问控制允许标头：x-requested-with、cache Control、content type、Origin、method、SOAPAction日期：2016年2月4日星期四09:08:15 GMT连接：keep alive

由于额外的字符，我无法对字符串进行json\U解码。可以做些什么？

Answer 1

我在Node.js中遇到了JSON. parse（）的相同问题。

var https = require('https');
var requestData = {
  "getCustomerProfileIdsRequest": {
    "merchantAuthentication": {
      "name": "your-auth-name-here",
      "transactionKey": "your-trans-key-name-here"
    }
  }
};
var requestString = JSON.stringify(requestData);
var req = https.request({
  host: "apitest.authorize.net",
  port: "443",
  path: "/xml/v1/request.api",
  method: "POST",
  headers: {
    "Content-Length": requestString.length,
    "Content-Type": "application/json"
  }
});

req.on('response', function (resp) {
  var response = '';

  resp.setEncoding('utf8');
  resp.on('data', function(chunk) {
    response += chunk;
  });
  resp.on('end', function() {
    var buf = new Buffer(response);
    console.log('buf[0]:', buf[0]); // 239 Binary 11101111
    console.log('buf[0] char:', String.fromCharCode(buf[0])); // "ï"
    console.log('buf[1]:', buf[1]); // 187 Binary 10111011
    console.log('buf[1] char:', String.fromCharCode(buf[1])); // "»"
    console.log('buf[2]:', buf[2]); // 191 Binary 10111111
    console.log('buf[2] char:', String.fromCharCode(buf[2])); // "¿"
    console.log('buf[3]:', buf[3]); // 123
    console.log('buf[3] char:', String.fromCharCode(buf[3])); // "{"

    // Note: The first three chars are a "Byte Order Marker" i.e. `BOM`, `ZERO WIDTH NO-BREAK SPACE`, `11101111 10111011 10111111`

    response = JSON.parse(response); // Throws error: 'Unrecoverable exception. Unexpected token SyntaxError: Unexpected token'
    console.log(response);
  });
});
req.on('error', function (error) {
  console.log(JSON.stringify(error));
});

req.on('socket', function(socket) {
  socket.on('secureConnect', function() {
    req.write(requestString);
    req.end();
  });
});

如果对响应调用trim（），它会起作用：

response = JSON.parse(response.trim());

或更换BOM表：

response = response.replace(/^\uFEFF/, '');
response = JSON.parse(response);

Answer 2

我在开发用于访问JSON API的库时遇到了同样的问题。在处理响应的代码中，我必须去掉这些字符，以便将字符串正确解码为JSON。

第113行：

$this->responseJson = preg_replace('/[\x00-\x1F\x80-\xFF]/', '', $responseJson);