如何使用odatajs讀取OData v4端點？

Question

我正在嘗試使用Olingo OData Client for JavaScript（odatajs）來讀取簡單的OData v4端點。

Olingo odatajs網頁說：

You may also use the documentation and the samples from the datajs library because the features and API are similar.

所以，我想用這段代碼閱讀的OData端點：

odatajs.read(uri, function (data) { 
    alert(JSON.stringify(data)); 
    }, function (err) { 
    alert(JSON.stringify(err)); 
}); 

但代碼給出了這樣的錯誤：

Uncaught TypeError: undefined is not a function 

使用jquery/ajax它總是調用錯誤函數，但是您可以看到用提琴手的響應。

Answer 1

這是odatajs git倉庫的測試案例，希望這是有幫助的：

var headers = { "Content-Type": "application/json", Accept: "application/json" }; 
var request = { 
    requestUri: "http://<wwww bla bla .com>/endpoints/FoodStoreDataServiceV4.svc/Foods", 
    method: "GET", 
    headers: headers, 
    data: null 
}; 


odatajs.oData.request(request, function (data, response) { 
    if ((response.statusCode == '200') && 
     (response.body.indexOf('}', response.body.length - 1) == response.body.length - 1) && 
     response.headers['Content-Type'] == "application/json;odata.metadata=minimal;odata.streaming=true;IEEE754Compatible=false;charset=utf-8") { 
     document.getElementById('msg').innerHTML += ("<div>odatajs V4 testing pass!</div>"); 
    } else { 
     document.getElementById('msg').innerHTML += ("<div>odatajs V4 testing failed.</div>"); 
    } 
}, function (err) { 
    document.getElementById('msg').innerHTML += ("<div>odatajs V4 testing failed.</div>"); 
});