作爲字節[]發送的字符串內容將其內容作爲查詢字符串轉義

我需要通過網絡發送字符串，並且我在Spring Boot的REST控制器的另一端獲取它。作爲字節[]發送的字符串內容將其內容作爲查詢字符串轉義

我有以下行發送的數據：

byte[] content = sw.toString().getBytes(StandardCharsets.UTF_8); //sw is StringWriter 
httpUrlConnection = (HttpURLConnection)new URL("http://127.0.0.1:8080/upload").openConnection(); 
httpUrlConnection.setDoInput(false); 
httpUrlConnection.setDoOutput(true); 
httpUrlConnection.setRequestMethod("POST"); 
httpUrlConnection.setFixedLengthStreamingMode(content.length); 
httpUrlConnection.connect(); 
httpUrlConnection.getOutputStream().write(content); 
httpUrlConnection.getOutputStream().flush();

而且我收到這樣的：

@RequestMapping(value="/upload", method = RequestMethod.POST) 
public ResponseEntity<String> upload(@RequestBody byte[] uploadedData) 
    throws NoSuchAlgorithmException, InvalidKeyException, IOException { 
    if(uploadedData == null) { 
    log.info("Uploaded data was null."); 
    return new ResponseEntity<String>("Data was null after upload.", HttpStatus.INTERNAL_SERVER_ERROR); 
    } 

    String receivedData = new String(uploadedData, StandardCharsets.UTF_8); 
    log.info("" + receivedData);

但是，當我要送這是... ...

我所得到的是這樣的：

-----BEGIN+CERTIFICATE+REQUEST-----%0D%0AMIIB0DCCATkCAQAwgY8xCzAJBgNVBAYTAkFVMSgwJgYDVQQKDB9UaGUgTGVnaW9u%0D%0AIG9mIHRoZSBCb3VuY3kgQ2FzdGxlMRIwEAYDVQQHDAlNZWxib3VybmUxETAPBgNV%0D%0ABAgMCFZpY3RvcmlhMS8wLQYJKoZIhvcNAQkBFiBmZWVkYmFjay1jcnlwdG9AYm91%0D%0AbmN5Y2FzdGxlLm9yZzCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAqE+pEyKS%0D%0A21JXgeldS83E+SSmQ4s2xYPqV7Yw2ebUKsxnbBz1KcXHdHS1MJ9PYzBJgogdigZW%0D%0A6hEQ83edP%2FAy%2FEQzGqeKUzFqNEsQh3PSdbF9N5k7b81tQHUbfIbNu1ofSBNa%2FEit%0D%0AMkOj1NAmwivpW0AA8aPZhGzYLYWcp0lsC78CAwEAAaAAMA0GCSqGSIb3DQEBBQUA%0D%0AA4GBAB0p0ySmfMkm3z8H4P8WwWJ8bMO2RNXEx0i9fU2ncJfdY0zEPYvM6zpUhwJP%0D%0AT9DsQBPdSy+VLbJ%2FPtYoiKIcupd+vriGYn3mqckXy7RBLqpiVsnw1rGE28oG4I9N%0D%0Au0p2AwDuC+KNuHgtrGxYrRnFTRKZpj2AoGuW1a6eSaNOhPeq%0D%0A-----END+CERTIFICATE+REQUEST-----%0D%0A=

這不好，因爲它殺死了PEM解析器。

不過，我可以通過以下變換克服這個問題，而字符串變成可解析...

receivedData = receivedData.replace("-----BEGIN+CERTIFICATE+REQUEST-----", "-----BEGIN CERTIFICATE REQUEST-----"); 
    receivedData = receivedData.replace("-----END+CERTIFICATE+REQUEST-----", "-----END CERTIFICATE REQUEST-----"); 
    receivedData = receivedData.replace("%0D%0A", "\r\n"); 
    receivedData = receivedData.replace("%2F", "/"); 
    receivedData = receivedData.substring(0, receivedData.length()-1);

在這種情況下，解析成功...

2014-10-18 16:26:43.864 INFO 2432 --- [nio-8080-exec-1] demo.HelloController      : PemParser returned: [email protected] 
2014-10-18 16:26:43.870 INFO 2432 --- [nio-8080-exec-1] demo.HelloController      : SUCCESS

..但我認爲這不是一種真正可行的做事方式，因爲它看起來不太穩定。一定有更好的方法。我嘗試了URLEncoder.decode(receivedData, "UTF-8");，但它從實際數據中刪除了+個字符，這也不好，因爲它使數據不可解析。

當我通過網絡發送String時，有沒有人有任何有用的想法來防止這個URL escaping？

來源

2014-10-18 EpicPandaForce

您執行了哪些診斷？你是否通過（比如說）Wireshark查看了發送的內容？你記錄了'sw'嗎？ – 2014-10-18 14:39:52

@JonSkeet'sw'工作得很好，沒有任何麻煩，並記錄了記錄的內容。也就是說，客戶端的數據有效。只有在我收到另一邊的字符串後，在這方面纔是一團糟。不過，我沒有檢查Wireshark。 – EpicPandaForce 2014-10-18 14:44:28

@JonSkeet ...當我沒有在只有一臺帶有本地主機的計算機上進行測試時，我不得不使用Wireshark進行檢查，因爲我沒有正確訪問路由器。這樣我沒有使用我的網絡接口，因此無法正確記錄數據包。我會在稍後看看。 – EpicPandaForce 2014-10-18 14:51:05

那麼，我仍然不知道的答案爲什麼發生了，但我做了一個解決方法。

而不是僅僅發送在String字節[]內容，我根據http://docs.oracle.com/javaee/7/tutorial/doc/jsonp003.htm與https://jsonp.java.net/index.html包裹在一個JSON對象的數據。

JsonObject model = Json.createObjectBuilder().add("data", sw.toString()).build(); 

httpsUrlConnection = (HttpsURLConnection)new URL("http://127.0.0.1:8443/upload").openConnection(); 

httpsUrlConnection.setDoInput(true); 
httpsUrlConnection.setDoOutput(true); 
httpsUrlConnection.setRequestProperty("Content-Type", "application/json"); 
httpsUrlConnection.setRequestMethod("POST"); 
httpsUrlConnection.connect(); 
try(JsonWriter jsonWriter = Json.createWriter(httpsUrlConnection.getOutputStream())) 
{ 
    jsonWriter.write(model); 
} 
httpsUrlConnection.getOutputStream().flush(); 
System.out.println("Response code: " + httpsUrlConnection.getResponseCode());

之後，在春季啓動的一面，我把它，這樣我就收到JSON對象按https://stackoverflow.com/a/8946142/2413303：

public class DataObject { 
    private String data; 

    public String getData() { 
    return data; 
    } 

    public void setData(String data) { 
    this.data = data; 
    } 
}

並在控制器：

@RequestMapping(value="/upload", method = RequestMethod.POST, consumes="application/json") 
    public ResponseEntity<String> upload(@RequestBody DataObject uploadedData) 
    throws NoSuchAlgorithmException, InvalidKeyException, IOException { 
    if(uploadedData == null) { 
     log.info("Uploaded data was null."); 
     return new ResponseEntity<String>("Data was null after upload.", HttpStatus.INTERNAL_SERVER_ERROR); 
    } 
    String receivedData = uploadedData.getData(); 
    log.info("" + receivedData);

這方式字符不逃脫：

2014-10-20 13:03:15.550 INFO 6924 --- [nio-8443-exec-3] demo.HelloController      : -----BEGIN CERTIFICATE REQUEST-----

編輯：我被告知，問題是沒有內容類型設置，春天默認爲application/x-www-form-urlencoded，因爲它應該是application/octet-stream。

EDIT2：隨着octet-stream，送過來逃脫\r和\n到\\r和\\n，以及之前和字符串出於某種原因後添加一個"。不知道爲什麼。

來源

作爲字節[]發送的字符串內容將其內容作爲查詢字符串轉義

回答

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