file_upload

之前已寫過一篇 Android 開發筆記 - HTTP、HTTPS、GET、POST、Cookie 筆記,最近則需要用 POST 上傳檔案,就順手在記一下。首先需從 http://hc.apache.org/downloads.cgi 下載 HttpClient (4.2.1) 後,從裡頭取出 httpmime-4.2.1.jar 檔拖到 Package Explorer > Your Project > libs 後,在按右鍵 Build Path > Add to Build Path...,如此一來在 Android 裡就能使用 MultipartEntity 進行上傳檔案的行為。若不使用的話,大概就自行實作鄉對應的格式也行。

PHP CGI:

<?php
echo "\nCOOKIE:<br/>\n";
print_r( $_COOKIE );

echo "\n<br/>FILES:<br/>\n";
print_r( $_FILES );

echo "\n<br/>REQUEST:<br/>\n";
print_r( $_REQUEST );

Android/Java:

public static void upload_testing() {
       // config
       String server = "127.0.0.1";
       String cgi = "http://"+server+"/upload.php";
       String file_path = "/mnt/sdcard/test.png";

       // http request parameters
       List<NameValuePair> params = new ArrayList<NameValuePair>();
       params.add( new BasicNameValuePair("hello", "world") ); // $_REQUEST['hello'] = 'world'

       MultipartEntity entity=new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);

       // build post parameters
       for( NameValuePair item : params )
              try {
                     entity.addPart(item.getName(),new StringBody(item.getValue(), Charset.forName("UTF-8")));
              } catch (UnsupportedEncodingException e) {
                     e.printStackTrace();
              }

       // add file data
       File src = new File(file_path);
       if( src.exists() )
              entity.addPart( "file", new FileBody( src ) ); // $_FILES['file']['name'] = 'test.png'

       // use cookie
       CookieStore cookies = new BasicCookieStore();
       Cookie mCookie = new BasicClientCookie("CookieName", "CookieValue"); // $_COOKIE['CookieName']
       ((BasicClientCookie)mCookie).setPath("/");
       ((BasicClientCookie)mCookie).setDomain(server);
       cookies.addCookie(mCookie);

       // build post query
       HttpPost post = new HttpPost(cgi);
       post.setEntity(entity);

       // do query with cookie
       HttpClient client = new DefaultHttpClient();
       HttpContext mHttpContext = new BasicHttpContext();
       mHttpContext.setAttribute(ClientContext.COOKIE_STORE, cookies);

       try {
              HttpResponse response = client.execute( post, mHttpContext );
              HttpEntity result = response.getEntity();
              System.out.println( EntityUtils.toString(result) );
       } catch (Exception e) {
              e.printStackTrace();
       }
}

成果:


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