private GetMethod convertHttpServletRequestToGetMethod(String url, HttpServletRequest request) {
GetMethod method = new GetMethod(url);
for (Enumeration headers = request.getHeaderNames(); headers.hasMoreElements(); ) {
String headerName = (String) headers.nextElement();
String headerValue = (String) request.getHeader(headerName);
method.addRequestHeader(headerName, headerValue);
}
method.removeRequestHeader("Host");
method.addRequestHeader("Host", request.getRequestURL().toString());
return method;
}
private HttpMethod redirectMethod(PostMethod postMethod) {
GetMethod method = new GetMethod(postMethod.getResponseHeader("Location").getValue());
for (Header header : postMethod.getRequestHeaders()) {
method.addRequestHeader(header);
}
return method;
}
/** 根据模版及参数产生静态页面 */
public boolean createHtmlPage(String url, String htmlFileName) {
boolean status = false;
int statusCode = 0;
try {
// 创建一个HttpClient实例充当模拟浏览器
httpClient = new HttpClient();
// 设置httpclient读取内容时使用的字符集
httpClient.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "gbk");
// 创建GET方法的实例
getMethod = new GetMethod(url);
// 使用系统提供的默认的恢复策略，在发生异常时候将自动重试3次
getMethod
.getParams()
.setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());
// 设置Get方法提交参数时使用的字符集,以支持中文参数的正常传递
getMethod.addRequestHeader("Content-Type", "text/html;charset=gbk");
// 执行Get方法并取得返回状态码，200表示正常，其它代码为异常
statusCode = httpClient.executeMethod(getMethod);
if (statusCode != 200) {
logger.fatal("静态页面引擎在解析" + url + "产生静态页面" + htmlFileName + "时出错!");
} else {
// 读取解析结果
sb = new StringBuffer();
in = getMethod.getResponseBodyAsStream();
br = new BufferedReader(new InputStreamReader(in));
while ((line = br.readLine()) != null) {
sb.append(line + "\n");
}
if (br != null) br.close();
page = sb.toString();
// 将页面中的相对路径替换成绝对路径，以确保页面资源正常访问
page = formatPage(page);
// 将解析结果写入指定的静态HTML文件中，实现静态HTML生成
writeHtml(htmlFileName, page);
status = true;
}
} catch (Exception ex) {
logger.fatal("静态页面引擎在解析" + url + "产生静态页面" + htmlFileName + "时出错:" + ex.getMessage());
} finally {
// 释放http连接
getMethod.releaseConnection();
}
return status;
}
