分享
 
 
 

用来获取网页的类(转!vb.net参考)

王朝c#·作者佚名  2006-11-24
窄屏简体版  字體: |||超大  

Imports System.Net

Imports System.IO

Public Class HttpDriverClass HttpDriver

Public Function GetPage()Function GetPage(ByVal url As String, Optional ByRef postPara As String = "", Optional ByRef encType As String = "GB2312") As String

Return GetPage(url, postPara, Nothing, False, encType)

End Function

Public Function GetPage()Function GetPage(ByVal url As String, ByRef postPara As System.Collections.Hashtable, Optional ByRef encType As String = "GB2312") As String

Return GetPage(url, ColToStr(postPara), encType)

End Function

Public Function GetPage()Function GetPage(ByVal url As String, ByRef postPara As String, ByRef cookies As CookieCollection, ByVal hasCookie As Boolean, Optional ByRef encType As String = "GB2312", Optional ByRef refer As String = "") As String

If (url.StartsWith("http://") = False) Then

url = "http://" & url

End If

Dim hRqst As HttpWebRequest = HttpWebRequest.Create(url)

If (hasCookie = True AndAlso (Not cookies Is Nothing)) Then

hRqst.CookieContainer = New CookieContainer

hRqst.CookieContainer.Add(cookies)

End If

hRqst.ContentType = "application/x-www-form-urlencoded"

hRqst.Headers.Add("Accept-Language", "zh-cn")

Dim streamData As Stream

Dim bt() As Byte

If (postPara = "") Then

hRqst.Method = "GET"

Else

hRqst.Method = "POST"

hRqst.AllowWriteStreamBuffering = True

bt = System.Text.Encoding.ASCII.GetBytes(postPara)

hRqst.ContentLength = bt.Length

hRqst.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)"

hRqst.Referer = refer

hRqst.KeepAlive = False

hRqst.Timeout = 20000

streamData = hRqst.GetRequestStream()

streamData.Write(bt, 0, bt.Length)

streamData.Close()

End If

Dim hRsp As HttpWebResponse

hRsp = hRqst.GetResponse()

streamData = hRsp.GetResponseStream()

If (hasCookie = True AndAlso (Not hRsp.Cookies Is Nothing)) Then

cookies.Add(hRsp.Cookies)

End If

If (encType = "") Then

encType = "GB2312"

End If

Dim readStream As New IO.StreamReader(streamData, System.Text.Encoding.GetEncoding(encType))

GetPage = readStream.ReadToEnd()

streamData.Close()

End Function

Public Function GetPage()Function GetPage(ByVal url As String, ByRef postPara As System.Collections.Hashtable, ByRef cookies As CookieCollection, ByVal hasCookie As Boolean, Optional ByRef encType As String = "GB2312") As String

Return GetPage(url, ColToStr(postPara), cookies, True, encType)

End Function

Public Function GetPage()Function GetPage(ByVal url As String, ByRef cookies As CookieCollection, ByVal hasCookie As Boolean, Optional ByRef encType As String = "GB2312") As String

Return GetPage(url, "", cookies, True, encType)

End Function

'该函数用于转换表单项集合为字符串

Public Shared Function ColToStr()Function ColToStr(ByRef ht As System.Collections.Hashtable, Optional ByRef encType As String = "GB2312") As String

Dim str As String

Dim para As DictionaryEntry

For Each para In ht

str &= System.Web.HttpUtility.UrlEncode(CType(para.Key, String), Text.Encoding.GetEncoding(encType))

str &= "="

str &= System.Web.HttpUtility.UrlEncode(CType(para.Value, String), Text.Encoding.GetEncoding(encType))

str &= "&"

Next

str = str.Substring(0, str.Length - 1)

Return str

End Function

End Class

如果需要支持cookie,并支持refer,可以通过下面这个类来使用上面的httpdriver。

'该类用于访问含有cookie的页面

Imports System.IO

Public Class UserAgentClass UserAgent

Private m_cookies As New System.Net.CookieCollection

Private refer As String

Private hd As New HttpDriver

Public Function GetPage()Function GetPage(ByVal url As String, Optional ByRef postPara As String = "", Optional ByRef encType As String = "GB2312") As String

GetPage = hd.GetPage(url, postPara, m_cookies, True, encType, refer)

refer = url

End Function

Public Function GetPage()Function GetPage(ByVal url As String, ByRef postPara As Hashtable, Optional ByRef encType As String = "GB2312") As String

Return GetPage(url, hd.ColToStr(postPara), encType)

End Function

Public Function SetCookie()Function SetCookie(ByVal cookies As System.Net.CookieCollection)

m_cookies = cookies

End Function

Public Function GetCookie()Function GetCookie() As System.Net.CookieCollection

Return m_cookies

End Function

End Class

轻量的get网页的函数

Public Function GetPage()Function GetPage(ByVal ur

[1] [2] 下一页

 
 
 
免责声明:本文为网络用户发布,其观点仅代表作者个人观点,与本站无关,本站仅提供信息存储服务。文中陈述内容未经本站证实,其真实性、完整性、及时性本站不作任何保证或承诺,请读者仅作参考,并请自行核实相关内容。
2023年上半年GDP全球前十五强
 百态   2023-10-24
美众议院议长启动对拜登的弹劾调查
 百态   2023-09-13
上海、济南、武汉等多地出现不明坠落物
 探索   2023-09-06
印度或要将国名改为“巴拉特”
 百态   2023-09-06
男子为女友送行,买票不登机被捕
 百态   2023-08-20
手机地震预警功能怎么开?
 干货   2023-08-06
女子4年卖2套房花700多万做美容:不但没变美脸,面部还出现变形
 百态   2023-08-04
住户一楼被水淹 还冲来8头猪
 百态   2023-07-31
女子体内爬出大量瓜子状活虫
 百态   2023-07-25
地球连续35年收到神秘规律性信号,网友:不要回答!
 探索   2023-07-21
全球镓价格本周大涨27%
 探索   2023-07-09
钱都流向了那些不缺钱的人,苦都留给了能吃苦的人
 探索   2023-07-02
倩女手游刀客魅者强控制(强混乱强眩晕强睡眠)和对应控制抗性的关系
 百态   2020-08-20
美国5月9日最新疫情:美国确诊人数突破131万
 百态   2020-05-09
荷兰政府宣布将集体辞职
 干货   2020-04-30
倩女幽魂手游师徒任务情义春秋猜成语答案逍遥观:鹏程万里
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案神机营:射石饮羽
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案昆仑山:拔刀相助
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案天工阁:鬼斧神工
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案丝路古道:单枪匹马
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案镇郊荒野:与虎谋皮
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案镇郊荒野:李代桃僵
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案镇郊荒野:指鹿为马
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案金陵:小鸟依人
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案金陵:千金买邻
 干货   2019-11-12
 
推荐阅读
 
 
 
>>返回首頁<<
 
靜靜地坐在廢墟上,四周的荒凉一望無際,忽然覺得,淒涼也很美
© 2005- 王朝網路 版權所有