未捕获的SyntaxError：意外的令牌：来自OpenLibrary api响应

时间：2014-06-11 23:12:18

标签： javascript json angularjs

我正在尝试使用AngularJS的$ http从openlibrary中提取JSON数据。我正在使用ISBN 1560761164

这是代码。

 $scope.fetch = function(isbn) {
       $scope.method = 'JSONP';
       $scope.url = "http://openlibrary.org/search.json?isbn=";

    $http({method: $scope.method, url: $scope.url + isbn + "&callback=JSON_CALLBACK"}).
    success(function(data, status) {
      $scope.status = status;
      $scope.data = data;

     }).
     error(function(data, status) {
        $scope.data = data;
        $scope.status = status;
     });

};

我最终在search.json

中收到以下错误 
Uncaught SyntaxError: Unexpected token :

我真的不确定为什么它会在这种情况下死亡，我尝试从JSONP中删除P（希望它能正确回复）但是我得到了404响应，它似乎没有用（很高兴成为纠正了那个）。

这是search.json的内容（在开发者控制台中）：

  {
   "start": 0, 
   "num_found": 2, 
   "numFound": 2, 
   "docs": [
    {
     "title_suggest": "Dark heart", 
     "edition_key": [
      "OL24911358M"
     ], 
     "isbn": [
      "1560761164", 
      "9781560761167"
     ], 
     "has_fulltext": false, 
     "text": [
      "OL24911358M", 
      "1560761164", 
      "9781560761167", 
      "Tina Daniell", 
      "Copyright Paperback Collection (Library of Congress)", 
      "25151948", 
      "OL776411A", 
      "American Fantasy fiction", 
      "Dark heart", 
      "OL16007376W", 
      "Tina Daniell", 
      "TSR Inc.", 
      "90071496"
     ], 
     "author_name": [
      "Tina Daniell"
     ], 
     "oclc": [
      "25151948"
     ], 
     "contributor": [
      "Copyright Paperback Collection (Library of Congress)"
     ], 
     "author_key": [
      "OL776411A"
     ], 
     "subject": [
      "American Fantasy fiction"
     ], 
     "title": "Dark heart", 
     "publish_date": [
      "1992"
     ], 
     "ebook_count_i": 0, 
     "publish_place": [
      "Lake Geneva, WI"
     ], 
     "edition_count": 1, 
     "key": "OL16007376W", 
     "publisher": [
      "TSR Inc."
     ], 
     "language": [
      "eng"
     ], 
     "lccn": [
      "90071496"
     ], 
     "last_modified_i": 1312010687, 
     "publish_year": [
      1992
     ], 
     "first_publish_year": 1992
    }, 
    {
     "title_suggest": "Dark Heart (Dragonlance: The Meetings Sextet, Vol. 3)", 
     "edition_key": [
      "OL8617758M"
     ], 
     "cover_i": 790919, 
     "isbn": [
      "1560761164", 
      "9781560761167"
     ], 
     "has_fulltext": true, 
     "text": [
      "OL8617758M", 
      "1560761164", 
      "9781560761167", 
      "Tina Daniell", 
      "darkheart00dani", 
      "OL776411A", 
      "Accessible book", 
      "American Fantasy fiction", 
      "In library", 
      "Protected DAISY", 
      "Dark Heart (Dragonlance: The Meetings Sextet, Vol. 3)", 
      "OL4132436W", 
      "Wizards of the Coast", 
      "KitiaRa Uth MataR stood iN thE shadE of a loNE oak on a small rise that overlooked a shallow valley."
     ], 
     "author_name": [
      "Tina Daniell"
     ], 
     "ia": [
      "darkheart00dani"
     ], 
     "author_key": [
      "OL776411A"
     ], 
     "subject": [
      "Accessible book", 
      "American Fantasy fiction", 
      "In library", 
      "Protected DAISY"
     ], 
     "title": "Dark Heart (Dragonlance: The Meetings Sextet, Vol. 3)", 
     "ia_collection_s": "printdisabled;inlibrary;browserlending;americana;internetarchivebooks", 
     "printdisabled_s": "OL8617758M", 
     "ebook_count_i": 1, 
     "ia_box_id": [
      "IA127609"
     ], 
     "edition_count": 1, 
     "first_publish_year": 1992, 
     "key": "OL4132436W", 
     "id_goodreads": [
      "92908"
     ], 
     "public_scan_b": false, 
     "publisher": [
      "Wizards of the Coast"
     ], 
     "language": [
      "eng"
     ], 
     "last_modified_i": 1340764985, 
     "lending_edition_s": "OL8617758M", 
     "id_librarything": [
      "193011"
     ], 
     "cover_edition_key": "OL8617758M", 
     "first_sentence": [
      "KitiaRa Uth MataR stood iN thE shadE of a loNE oak on a small rise that overlooked a shallow valley."
     ], 
     "publish_year": [
      1992
     ], 
     "publish_date": [
      "January 1, 1992"
     ]
    }
   ]
  }

是否有人建议从客户端应用程序中提取此数据而不必处理后端？

编辑：这是电话api的链接。 https://openlibrary.org/dev/docs/api/search

  

API的URL格式很简单。获取搜索URL并替换   /用/search.json搜索。

     

http://openlibrary.org/search?q=the+lord+of+the+rings

     

http://openlibrary.org/search?title=the+lord+of+the+rings

     

http://openlibrary.org/search.json?author=tolkien

     

http://openlibrary.org/search?q=the+lord+of+the+rings&page=2

我猜它没有显式地声明isbn，但是如果你访问了URL它会实际显示一个有效的JSON对象，我会因为某种原因无法“检索”它，所以数据会正确返回。

失败的示例工作URL：

  

http://openlibrary.org/search.json?isbn=1560761164&callback=angular.callbacks._0

其他信息：

在没有JSONP的情况下调用它并仅使用JSON作为方法我得到以下控制台错误：

  

OPTIONS http://openlibrary.org/search.json?isbn=1560761164 405（Method Not Allowed）angular.js：7962

     

XMLHttpRequest无法加载http://openlibrary.org/search.json?isbn=1560761164。请求的资源上不存在“Access-Control-Allow-Origin”标头。因此，不允许原点'null'访问。

这是JSON请求标头：

OPTIONS /search.json?isbn=1560761164 HTTP/1.1
Host: openlibrary.org
Connection: keep-alive
Cache-Control: no-cache
Access-Control-Request-Method: JSON
Pragma: no-cache
Origin: null
User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36
Access-Control-Request-Headers: accept
Accept: */*
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8

并回复：

HTTP/1.1 405 Method Not Allowed
Server: nginx/0.8.54
Date: Wed, 11 Jun 2014 23:31:10 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Allow: GET, HEAD, POST, PUT, DELETE
X-OL-Stats: ""
Connection: Keep-Alive

以下是JSONP请求标头：

GET /search.json?isbn=1560761164&callback=angular.callbacks._0 HTTP/1.1
Host: openlibrary.org
Connection: keep-alive
Cache-Control: no-cache
Accept: */*
Pragma: no-cache
User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Cookie: session="/people/onaclov2000%2C2014-06-02T20%3A09%3A47%2C350bc%2428943338f8cbec882f19b2851f81ae1e"

并回复：

HT 

TP/1.1 200 OK
Server: nginx/0.8.54
Date: Wed, 11 Jun 2014 23:32:27 GMT
Transfer-Encoding: chunked
X-OL-Stats: "IB 1 0.008 MC 1 0.001 SR 1 0.075 TT 0 0.091"
Connection: Keep-Alive

1 个答案:

答案 0 :(得分：0)

解决方案： 获取该网站的开发人员并请求CORS可用（或JSONP）。

听了我一点，但我确实发现我无法调用JSON，我不得不使用GET

我查看了响应标题并看到了这导致我进入GET方面而不是JSON：注意它说Allow方法获取，选项＆lt; - 这表示允许GET不是JSON。

HTTP/1.1 200 OK
Server: nginx/0.8.54
Date: Fri, 13 Jun 2014 13:08:19 GMT
Transfer-Encoding: chunked
Access-Control-Allow-Origin: *
Access-Control-Allow-Method: GET, OPTIONS
Access-Control-Max-Age: 86400
Connection: Keep-Alive

一旦我这样做，这就是我所使用的（我真的看了一遍，只是把东西拉到一起，直到我弄明白了。）

 <script>
      var app = angular.module("myapp", []);

app.config(function($httpProvider) {
    //Enable cross domain calls
    $httpProvider.defaults.useXDomain = true;
    delete $httpProvider.defaults.headers.common['X-Requested-With'];
    $httpProvider.defaults.headers.post["Content-Type"] = "application/x-www-form-urlencoded";
});
      function MyController($scope, $http) {
       $scope.fetch = function(isbn) {
           $scope.method = 'GET';

           $scope.url = "http://openlibrary.org/search.json?isbn=";

        $http({method: $scope.method, url: $scope.url + isbn  
                }).
        success(function(data, status) {
          $scope.status = status;
          $scope.data = data;

         }).
         error(function(data, status) {
            $scope.data = data;
            $scope.status = status;
         });
};
      }
    </script>
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