base64 android C# 轉碼

需求：android 客戶端上傳圖片到C#服務端。

Android端:

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//Base64.DEFAULT當字符串過長（一般超過76)時會自動在中間加一個換行符，字符串最後也會加一個換行符，這樣就導致和其他模塊對接時結果不一致 。由於圖片太大，所有參數不能用DEFAULT，而用NO_WRAP。

String baseStr = new String (Base64.encode(fileByte,Base64.NO_WRAP), Charset.forName("ISO-8859-1"));

//Charset.forName("ISO-8859-1")我加上了這個測試是可以用的，但刪除之後是否可用，未測試。

http post:

public static String httpPost(String url, String param)  {
     String result = "";

    URL localURL = null;
    try {
        localURL = new URL(url);
    } catch (MalformedURLException e) {
        result = e.getMessage();
        return result;
    }
    URLConnection connection = null;
    try {
        connection = localURL.openConnection();
    } catch (IOException e) {
        result = e.getMessage();
        return result;
    }
    HttpURLConnection httpURLConnection = (HttpURLConnection) connection;

    httpURLConnection.setDoOutput(true);
    try {
        httpURLConnection.setRequestMethod("POST");
    } catch (ProtocolException e) {
        result = e.getMessage();
        return result;
    }
    httpURLConnection.setRequestProperty("Accept-Charset", "utf-8");
    httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    httpURLConnection.setRequestProperty("Content-Length", String.valueOf(param.length()));
    httpURLConnection.setConnectTimeout(10000);

    OutputStream outputStream = null;
    OutputStreamWriter outputStreamWriter = null;
    InputStream inputStream = null;
    InputStreamReader inputStreamReader = null;
    BufferedReader reader = null;

    try {
        outputStream = httpURLConnection.getOutputStream();
        outputStreamWriter = new OutputStreamWriter(outputStream);

        outputStreamWriter.write(param.toString());
        outputStreamWriter.flush();
        int responseCode = httpURLConnection.getResponseCode();
        if (responseCode >= 300) {
            result = "HTTP Request is not success, Response code is " + responseCode;
        }

        inputStream = httpURLConnection.getInputStream();
        result = convertStreamToString(inputStream);
        System.out.println(result);

    } catch (Exception e) {
        result = e.getMessage();
        return result;
    } finally {
        try {
            if (outputStreamWriter != null) {
                outputStreamWriter.close();
            }

            if (outputStream != null) {
                outputStream.close();
            }
            if (reader != null) {
                reader.close();
            }
            if (inputStreamReader != null) {
                inputStreamReader.close();
            }
            if (inputStream != null) {
                inputStream.close();
            }
        }catch (Exception e){
            result = e.getMessage();
            return result;
        }
    }
    return result;
}

http 調用方式:

    String url = path+"/uploadImage";
    String param = "cid="+cid+"&imageStr="+imageStr;;
    httpPost(url,param);

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C#端:

 

public string uploadImage(string cid, string imageStr){
    string dummyData = imageStr.Trim().Replace("%", "").Replace(",", "").Replace(" ", "+");
    if (dummyData.Length % 4 > 0)
    {
        dummyData = dummyData.PadRight(dummyData.Length + 4 - dummyData.Length % 4, '=');
    }
    byte[] imageFileByte = Convert.FromBase64String(dummyData);
}