这个文章主要是熟悉Upload数据时的数据格式,许多的upload组件看上去很神秘,其实内部并不复杂。
一、我们先来看看当表单
类型为multipart/form-data
<form action="/admin/blogs" enctype="multipart/form-data" id="blog_form" method="post">
// 标题
<input class="text required min-length-3 bad-words" id="blog_title" maxlength="50"
name="blog[title]" size="45" style="width:400px;" type="text" />
// 内容
<textarea class="validate-richeditor bad-words min-length-5" cols="40" id="editor_body"
name="blog[body]" rows="20" style="width: 510px; height: 350px;"></textarea>
</form>
二、拿到的一个数据
- ...
- Content-Type: multipart/form-data; boundary=---------------------------29510474520649
- Content-Length: 4281
- -----------------------------29510474520649
- Content-Disposition: form-data; name="blog[blog_type]"
- 1
- -----------------------------29510474520649
- Content-Disposition: form-data; name="blog[title]"
- 测试博客标题
- -----------------------------29510474520649
- Content-Disposition: form-data; name="blog[category_id]"
- -----------------------------29510474520649
- Content-Disposition: form-data; name="blog[user_tags]"
- -----------------------------29510474520649
- Content-Disposition: form-data; name="auto_save_id"
- -----------------------------29510474520649
- Content-Disposition: form-data; name="blog[bbcode]"
- true
- -----------------------------29510474520649
- Content-Disposition: form-data; name="blog[body]"
- 测试博客的内容,
- 附件为java2000.net的LOGO
- -----------------------------29510474520649
- Content-Disposition: form-data; name="blog[diggable]"
- 0
- -----------------------------29510474520649
- Content-Disposition: form-data; name="blog[forum_id]"
- -----------------------------29510474520649
- Content-Disposition: form-data; name=""; filename=""
- Content-Type: application/octet-stream
- -----------------------------29510474520649
- Content-Disposition: form-data; name="attachments[][remark]"
- java2000.net的LOGO
- -----------------------------29510474520649
- Content-Disposition: form-data; name="attachments[][uploaded_data]"; filename="www.java2000.net.gif"
- Content-Type: image/gif
- GIF89a。。。。。
- -----------------------------29510474520649
- Content-Disposition: form-data; name="commit"
- 提交
- -----------------------------29510474520649--
解释一下,其中的
Content-Type: multipart/form-data; boundary=---------------------------29510474520649
是关键,前面代表提交数据的类型,后面是分割边界的标志boundary
后面的数据,使用 -- 加上 boundary 作为分割标志
最后一行数据,使用 -- 加上boundary 再加上 -- 作为结尾标志
三,根据数据我们配置了一个提交数据的模板
- {BOUNDARY}{BR}Content-Disposition: form-data; name="blog[blog_type]"{BR}{BR}1{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[title]"{BR}{BR}{TITLE}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[category_id]"{BR}{BR}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[user_tags]"{BR}{BR}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="auto_save_id"{BR}{BR}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[bbcode]"{BR}{BR}true{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[body]"{BR}{BR}{CONTENT}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[forum_id]"{BR}{BR}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="commit"{BR}{BR}{SUBMIT}{BR}{BOUNDARY}--{BR}
其中的
{BOUNDARY} 是分割标志,
{BR}是换行
{TITLE}是标题
{CONTENT}是内容
{SUBMIT}是提交的按钮标签
四、用程序提交数据
对于cookie的操作和获取我就不多说了,请自行参考前一个文章。
1 这里只贴出来一个简单的配置结果
- host=zhaoxq-java2000-net.javaeye.com
- charset=UTF-8
- cookie=
- post=http://zhaoxq-java2000-net.javaeye.com/admin/blogs/new
- action=http://zhaoxq-java2000-net.javaeye.com/admin/blogs
- message={BOUNDARY}{BR}Content-Disposition: form-data; name="blog[blog_type]"{BR}{BR}1{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[title]"{BR}{BR}{TITLE}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[category_id]"{BR}{BR}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[user_tags]"{BR}{BR}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="auto_save_id"{BR}{BR}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[bbcode]"{BR}{BR}true{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[body]"{BR}{BR}{CONTENT}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="blog[forum_id]"{BR}{BR}{BR}{BOUNDARY}{BR}Content-Disposition: form-data; name="commit"{BR}{BR}{SUBMIT}{BR}{BOUNDARY}--{BR}
2 发布的程序
- package net.java2000.blogsender.javaeye;
- import java.io.IOException;
- import java.util.Properties;
- import net.java2000.blogsender.Sender;
- import net.java2000.blogsender.baidu.BaiduSender;
- import net.java2000.blogsender.util.PostUtil;
- public class JavaEyeSender implements Sender {
- private String host;
- private String charset;
- private String post;
- private String action;
- private String cookie;
- private String message;
- private String boundary;
- public boolean send(String title, String content) {
- return PostUtil.postMultiPart(host, charset, action, post, cookie, message, boundary, title, content);
- }
- public JavaEyeSender() {
- Properties p = new Properties();
- try {
- p.load(BaiduSender.class.getResourceAsStream("javaeye.properties"));
- host = p.getProperty("host");
- charset = p.getProperty("charset");
- post = p.getProperty("post");
- action = p.getProperty("action");
- cookie = p.getProperty("cookie");
- message = p.getProperty("message");
- boundary = "---------------------------" + System.currentTimeMillis();
- String boundary1 = "--" + boundary;
- message = message.replace("{BR}", "/r/n");
- message = message.replace("{BOUNDARY}", boundary1);
- message = message.replace("{SUBMIT}", "提交");
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- public static void main(String[] args) {
- Sender sender = new JavaEyeSender();
- sender.send("测试测试", "测试[b]测试测[/b]试/r/n121212/r/n32324324/r/n65465465465/r/n");
- }
- }
3 发布数据的辅助类
- public static boolean postMultiPart(String host, String charset, String postURL, String referer, String cookies, String message, String boundary, String title, String content) {
- try {
- URL url = new URL(postURL);
- HttpURLConnection con = (HttpURLConnection) url.openConnection();
- con.setDoOutput(true); // POST方式
- con.setDoInput(true);
- con.setRequestMethod("POST");
- con.addRequestProperty("Host", host);
- con.addRequestProperty("Referer", referer);
- con.addRequestProperty("Cookie", cookies.trim());
- con.addRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
- message = message.replace("{TITLE}", title);
- message = message.replace("{CONTENT}", content);
- con.addRequestProperty("Content-Length", Integer.toString(message.getBytes(charset).length));
- OutputStream os = con.getOutputStream(); // 输出流,写数据
- os.write(message.getBytes(charset));
- os.flush();
- BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream(), charset)); // 读取结果
- String line;
- while ((line = reader.readLine()) != null) {
- System.out.println(line);
- // break;
- }
- os.close();
- reader.close();
- return true;
- } catch (Exception ex) {
- ex.printStackTrace();
- return false;
- }
- }
五、总结:
我简单说明了提交upload数据的格式已经实现的一个简单方法。有兴趣的人可以自行看看html的协议内容,里面讲解的很清楚。你会对upload不在神秘。
顺便说一句,对于二进制数据的提交,大部分会进行Base64或者QP的编码,这样整个数据里面将只有ASCII码,而不会出现怪字符。不过有些客户端,不会这么做。
这个数据格式与我们邮件的内部格式非常类似。
原文地址:http://www.java2000.net/p8849