问题描述

            uploader.onBeforeUploadItem = function (item) {
                //修改名字
                var timeStamp = new Date().getTime();
                var fileName = item.file.name;
                item.file.name = timeStamp + fileName.substr(fileName.lastIndexOf(‘.‘));
                var day = $filter(‘date‘)(new Date(), ‘yyyyMMdd‘);
                item.url = [item.url, "batchImport", item.importType, day, session.userId].join("/");
            };

        1. 添加 HTTP 参数

        2. 添加 HTTP 信息头管理器

        3. 使用 BeanShell

    /**
     * Write the start of a file multipart, up to the point where the
     * actual file content should be written
     */
    private void writeStartFileMultipart(OutputStream out, String filename,
            String nameField, String mimetype)
            throws IOException {
        write(out, "Content-Disposition: form-data; name=\""); // $NON-NLS-1$
        write(out, nameField);
        write(out, "\"; filename=\"");// $NON-NLS-1$
        write(out, new File(filename).getName());
        writeln(out, "\""); // $NON-NLS-1$
        writeln(out, "Content-Type: " + mimetype); // $NON-NLS-1$
        writeln(out, "Content-Transfer-Encoding: binary"); // $NON-NLS-1$
        out.write(CRLF);
    }

                try {
                    conn = setupConnection(url, method, res);
                    // Attempt the connection:
                    savedConn = conn;
                    conn.connect();
                    break;
                } catch (BindException e) {
                    if (retry >= MAX_CONN_RETRIES) {
                        log.error("Can‘t connect after "+retry+" retries, "+e);
                        throw e;
                    }
                    log.debug("Bind exception, try again");
                    if (conn!=null) {
                        savedConn = null; // we don‘t want interrupt to try disconnection again
                        conn.disconnect();
                    }
                    setUseKeepAlive(false);
                    continue; // try again
                } catch (IOException e) {
                    log.debug("Connection failed, giving up");
                    throw e;
                }
            }
            if (retry > MAX_CONN_RETRIES) {
                // This should never happen, but...
                throw new BindException();
            }
            // Nice, we‘ve got a connection. Finish sending the request:
            if (method.equals(HTTPConstants.POST)) {
                String postBody = sendPostData(conn);
                res.setQueryString(postBody);
            }	

    protected HttpURLConnection setupConnection(URL u, String method, HTTPSampleResult res) throws IOException {
        SSLManager sslmgr = null;
        if (HTTPConstants.PROTOCOL_HTTPS.equalsIgnoreCase(u.getProtocol())) {
            try {
                sslmgr=SSLManager.getInstance(); // N.B. this needs to be done before opening the connection
            } catch (Exception e) {
                log.warn("Problem creating the SSLManager: ", e);
            }
        }


        final HttpURLConnection conn;
        final String proxyHost = getProxyHost();
        final int proxyPort = getProxyPortInt();
        if (proxyHost.length() > 0 && proxyPort > 0){
            Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, proxyPort));
            //TODO - how to define proxy authentication for a single connection?
            // It‘s not clear if this is possible
//            String user = getProxyUser();
//            if (user.length() > 0){
//                Authenticator auth = new ProxyAuthenticator(user, getProxyPass());
//            }
            conn = (HttpURLConnection) u.openConnection(proxy);
        } else {
            conn = (HttpURLConnection) u.openConnection();
        }


        // Update follow redirects setting just for this connection
        conn.setInstanceFollowRedirects(getAutoRedirects());


        int cto = getConnectTimeout();
        if (cto > 0){
            conn.setConnectTimeout(cto);
        }


        int rto = getResponseTimeout();
        if (rto > 0){
            conn.setReadTimeout(rto);
        }


        if (HTTPConstants.PROTOCOL_HTTPS.equalsIgnoreCase(u.getProtocol())) {
            try {
                if (null != sslmgr){
                    sslmgr.setContext(conn); // N.B. must be done after opening connection
                }
            } catch (Exception e) {
                log.warn("Problem setting the SSLManager for the connection: ", e);
            }
        }


        // a well-bahaved browser is supposed to send ‘Connection: close‘
        // with the last request to an HTTP server. Instead, most browsers
        // leave it to the server to close the connection after their
        // timeout period. Leave it to the JMeter user to decide.
        if (getUseKeepAlive()) {
            conn.setRequestProperty(HTTPConstants.HEADER_CONNECTION, HTTPConstants.KEEP_ALIVE);
        } else {
            conn.setRequestProperty(HTTPConstants.HEADER_CONNECTION, HTTPConstants.CONNECTION_CLOSE);
        }


        conn.setRequestMethod(method);
        setConnectionHeaders(conn, u, getHeaderManager(), getCacheManager());
        String cookies = setConnectionCookie(conn, u, getCookieManager());


        setConnectionAuthorization(conn, u, getAuthManager());


        if (method.equals(HTTPConstants.POST)) {
            setPostHeaders(conn);
        } else if (method.equals(HTTPConstants.PUT)) {
            setPutHeaders(conn);
        }


        if (res != null) {
            res.setRequestHeaders(getConnectionHeaders(conn));
            res.setCookies(cookies);
        }


        return conn;
    }

        解决方案

        HTTP 请求 - Implementation 选择的是 Java 的解决办法

    /**
     * Write the start of a file multipart, up to the point where the
     * actual file content should be written
     */
    private void writeStartFileMultipart(OutputStream out, String filename,
            String nameField, String mimetype)
            throws IOException {
        write(out, "Content-Disposition: form-data; name=\""); // $NON-NLS-1$
        write(out, nameField);
        write(out, "\"; filename=\"");// $NON-NLS-1$
        write(out, nameField);
        writeln(out, "\""); // $NON-NLS-1$
        writeln(out, "Content-Type: " + mimetype); // $NON-NLS-1$
        writeln(out, "Content-Transfer-Encoding: binary"); // $NON-NLS-1$
        out.write(CRLF);
    }

        HTTP 请求 - Implementation 选择的是 HttpClient4 的解决办法

            ViewableFileBody[] fileBodies = new ViewableFileBody[files.length];
            for (int i=0; i < files.length; i++) {
                HTTPFileArg file = files[i];
                fileBodies[i] = new ViewableFileBody(new File(file.getPath()), file.getMimeType());
                multiPart.addPart(file.getParamName(),fileBodies[i]);
            }
            post.setEntity(multiPart);


            if (multiPart.isRepeatable()){
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                for(ViewableFileBody fileBody : fileBodies){
                    fileBody.hideFileData = http://www.mamicode.com/true;>
        可以看出，文件信息就在 postedBody.append(new String(bos.toByteArray(), 句写入 post 体(读者感兴趣的话可以去断点跟踪，或者打 log 验证)，它写入的就是这个 ViewableFileBody 对象。找到 ViewableFileBody 类，其源码为：
    // Helper class so we can generate request data without dumping entire file contents
    private static class ViewableFileBody extends FileBody {
        private boolean hideFileData;
        
        public ViewableFileBody(File file, String mimeType) {
            super(file, mimeType);
            hideFileData = http://www.mamicode.com/false;>
        可以看出它继承自 org.apache.http.entity.mime.content.FileBody，FileBody 有 getFilename 方法，查看其源码：
    public String getFilename() {
        return this.file.getName();
    }

        好了，就从这里入手了。修改 org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl 的内部类 ViewableFileBody 如下：
    // Helper class so we can generate request data without dumping entire file contents
    private static class ViewableFileBody extends FileBody {
        private boolean hideFileData;
        
        public ViewableFileBody(File file, String mimeType) {
            super(file, mimeType);
            hideFileData = http://www.mamicode.com/false;>
        OK，编译 - 覆盖 - 打包，然后把 JMeter 安装目录下的 lib/ext 下的原有的 ApacheJMeter_http.jar 删掉，使用新打包的。重新执行测试，截取的 HTTP 请求如下：
POST http://serverIP/upload/batchImport/merAdd/20141128/1

POST data:
--QpmvliwpJdOaJSQGKd-Ux3tR_7HnPX3s1K8KA
Content-Disposition: form-data; name="file"; filename="1417182984171.xls"
Content-Type: application/vnd.ms-excel
Content-Transfer-Encoding: binary

<actual file content, not shown here>
--QpmvliwpJdOaJSQGKd-Ux3tR_7HnPX3s1K8KA--

Cookie Data:
$Version=0; JSESSIONID=56E8E454EA4F1378AAE45DD0A89A9FE5; $Path=/

Request Headers:
Connection: keep-alive
Content-Length: 34542
Content-Type: multipart/form-data; boundary=QpmvliwpJdOaJSQGKd-Ux3tR_7HnPX3s1K8KA
Host: serverIP
User-Agent: Apache-HttpClient/4.2.6 (java 1.5)
        可以看到，filename 终于不再是 00000000.xls 了，服务器返回的存储路径是 /batchImport/merAdd/20141128/1/1417182984171.xls。成功了。
        备注：笔者下载的 JMeter Binaries 和 Source 的版本都是 2.12。
        HTTP 请求 - Implementation 选择的是 HttpClient3.1 的解决办法
        嗯，对，没错，就是 org.apache.jmeter.protocol.http.sampler.HTTPHC3Impl。这个留给聪明的读者去实现吧:)
JMeter 上传文件时，如何参数化 Content-Disposition 的 filename？