如何檢索HTTP響應錯誤的詳細信息

Question

我有一個node.js應用程序正在向ReST Web服務發出一些https請求。 我想做一些事情，就它而言，看起來應該很簡單 - 檢索從Web服務返回的錯誤消息。

我可以得到狀態碼 - 即200,404等，但不是錯誤的細節。

響應的身體看起來是這樣的：

{ 
    "type": "http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.5", 
    "title" : "Not Found", 
    "status": "404", 
    "detail": "Resource not found: X33003" 
} 

我的代碼如下所示：

var options = { 
    "method": "POST", 
    "hostname": "myhost.com", 
    "port": null, 
    "path": "/mypath/", 
    "headers": { 
     "content-type": "application/json", 
     "authorization": basicAuthString, 
     "cache-control": "no-cache" 
    } 
}; 

try { 
    var reqWorkSkill = http.request(options, function(res) { 
    var chunks = []; 
    res.on("data", function(chunk) { 
     chunks.push(chunk); 
    }); 
    res.on("end", function() { 
     var body = Buffer.concat(chunks);    
     var response = JSON.parse(body); 
     console.log("Detail: " + body.detail); // COMES BACK UNDEFINED 
    }); 
    res.on("error", function(error) {   
     console.log("Something went wrong with: " + resourceIdArray[i] + " failed: " + error); 
    }); 
    if(res.statusCode != 200){ 
     // Do some stuff 
    } 
    console.log("res status: " + res.statusCode); 
    console.log("res text: " + res.statusText); // COMES BACK UNDEFINED 

    }); 
    reqWorkSkill.write(itemToPost);      
    reqWorkSkill.end(); 
} 
catch (e) { 
    console.log(e); 
} 

這將是能夠提出究竟是什麼出了問題有用的 - 即消息：未找到資源：上面的JSON中的X33003。我怎麼能得到這個？

Answer 1

您剛纔調用的對象屬性錯誤。首先，你打電話body.detail，但body是Buffer表示。您需要撥打response上的detail屬性。其次，您試圖獲得響應的statusText屬性，但正確的屬性是statusMessage。代碼最終是這樣的：

var options = { 
    "method": "POST", 
    "hostname": "myhost.com", 
    "port": null, 
    "path": "/mypath/", 
    "headers": { 
     "content-type": "application/json", 
     "authorization": basicAuthString, 
     "cache-control": "no-cache" 
    } 
}; 

try { 
    var reqWorkSkill = http.request(options, function(res) { 
    var chunks = []; 
    res.on("data", function(chunk) { 
     chunks.push(chunk); 
    }); 
    res.on("end", function() { 
     var body = Buffer.concat(chunks);    
     var response = JSON.parse(body); 
     console.log("Detail: " + response.detail); // response, not body 
    }); 
    res.on("error", function(error) {   
     console.log("Something went wrong with: " + resourceIdArray[i] + " failed: " + error); 
    }); 
    if(res.statusCode != 200){ 
     // Do some stuff 
    } 
    console.log("res status: " + res.statusCode); 
    console.log("res text: " + res.statusMessage); // statusMessage, not statusText 

    }); 
    reqWorkSkill.write(itemToPost);      
    reqWorkSkill.end(); 
} 
catch (e) { 
    console.log(e); 
} 

它總是一個好主意，console.log（或等值）你試圖訪問，如果你沒有得到正確的結果對象，會告訴你所有屬性的對象。