private void Form1_Load(object sender, EventArgs e)
{
//从主页获取__VIEWSTATE信息
debug_output("开始重定向教务URL");
var ns = new NetStream();
ns.HttpGetAsync(main_page_url, url_locate_callback, null);
}
//获取选课列表
private void get_public_course(bool get_mode = true)
{
var url = get_session_url() + "/xf_xsqxxxk.aspx?xh=" + username.Text + "&gnmkdm=N121103";
var ns = new NetStream();
var header_param = new Parameters();
header_param.Add("Referer", get_session_url() + "xs_main.aspx?xh=" + username.Text);
if (get_mode)
{
//get模式下获取选课课表
debug_output("初始化选课列表数据");
ns.HttpGetAsync(url, get_public_course_callback, headerParam: header_param, state: get_mode);
}
else
{
//post模式下获取选课课表
debug_output("获取全部选课信息");
header_param.Add("Origin", get_origin_url());
string course_time = "", course_name = "";
Invoke(new ThreadStart(delegate
{
course_time = courseTime.Text;
course_name = courseName.Text;
}));
var post_param = new Parameters();
post_param.Add("__EVENTTARGET", "");
post_param.Add("__EVENTARGUMENT", "");
post_param.Add("__VIEWSTATE", __VIEWSTATE);
post_param.Add("ddl_kcxz", "");
post_param.Add("ddl_ywyl", "");
post_param.Add("ddl_kcgs", "");
post_param.Add("ddl_xqbs", 2);
post_param.Add("ddl_sksj", "");
post_param.Add("TextBox1", "");
post_param.Add("dpkcmcGrid:txtChoosePage", 1);
post_param.Add("dpkcmcGrid:txtPageSize", 200);
var post_data = Encoding.UTF8.GetBytes(post_param.BuildQueryString());
ns.HttpPostAsync(url, post_data.Length, (sender, e) =>
{
try
{
sender.RequestStream.Write(post_data, 0, post_data.Length);
sender.HttpPostResponseAsync(get_public_course_callback, get_mode);
}
catch (Exception)
{
debug_output("查询选课列表失败，3s后重试");
sender.Close();
get_public_course(get_mode);
}
}, state: get_mode, postContentType: NetStream.DEFAULT_CONTENT_TYPE_PARAM, headerParam: header_param);
}
}
//将jw2005.scuteo.com通过302重定向到指定的ip地址
private void url_locate_callback(NetStream sender, object e)
{
//失败重试
if (sender.HTTP_Response == null || (int)sender.HTTP_Response.StatusCode > 400)
{
if (sender.HTTP_Response == null)
{
debug_output("重定向出错，3s后重试");
}
else
{
debug_output("重定向出错:服务器返回状态码 " + (int)sender.HTTP_Response.StatusCode + "(" + sender.HTTP_Response.StatusCode.ToString() + ")，3s后重试");
}
Thread.Sleep(3000);
var url = sender.HTTP_Request.RequestUri.ToString();
sender.Close();
var ns = new NetStream();
ns.HttpGetAsync(main_page_url, url_locate_callback, null);
return;
}
//将主页url更改成30X跳转后响应的url
main_page_url = sender.HTTP_Response.ResponseUri.ToString();
//获取主页面的html信息（gb2312编码）
var str_main_page = sender.ReadResponseString(Encoding.Default);
//关闭http请求
sender.Close();
//正则匹配，获取viewstate
var match = Regex.Match(str_main_page, "<input\\stype=\"hidden\"\\sname=\"__VIEWSTATE\"\\svalue=\"(?<value>[^\"]*?)\"\\s*/>");
if (match.Success)
{
__VIEWSTATE = match.Result("${value}");
}
else
{
debug_output("获取VIEWSTATE属性值失败，3s后重试");
Thread.Sleep(3000);
var ns = new NetStream();
ns.HttpGetAsync(main_page_url, url_locate_callback, null);
return;
}
//刷新验证码
refresh_captcha();
//登陆按钮可点（委托到主线程）
Invoke(new ThreadStart(delegate
{
login.Enabled = true;
}));
}
//刷新验证码
private void refresh_captcha()
{
debug_output("获取验证码图片");
var url = get_session_url() + "/CheckCode.aspx";
var ns = new NetStream();
var header_param = new Parameters();
header_param.Add("Origin", main_page_url);
ns.HttpGetAsync(url, (_sender, _e) =>
{
var memstream = new MemoryStream();
int readed_bytes = 0;
//从网络数据流转移到内存数据流中
const int buffer_size = 4096;
var buffer = new byte[buffer_size];
do
{
readed_bytes = _sender.ResponseStream.Read(buffer, 0, buffer_size);
memstream.Write(buffer, 0, readed_bytes);
} while (readed_bytes > 0);
ns.Close();
memstream.Seek(0, SeekOrigin.Begin);
var img = Image.FromStream(memstream); //从内存流中创建图像
//主线程委托
Invoke(new ThreadStart(delegate
{
captchaImg.Image = img;
if (ocr_wrapper != null)
{
capcha.Text = ocr_wrapper.OCR_Image(img);
}
}));
}, headerParam: header_param);
}