C# HttpWebRequest Post 带有特殊字符串的表单数据
C# HttpWebRequest Post form data with special string
我正在尝试 post 将数据形成到外部 url 以检索 html 响应。
当我尝试使用 .html 文件中的 html 表单元素 post 这些值时，它工作正常。
但是，当尝试使用 C# HttpWebRequest post 相同的值时，它不起作用。
有问题的变量是这样的：
<input type="hidden" name="id" id="id" value='2015-08-19 13:30:00:::2015-08-19 16:40:00:::Estarder 1:::V:::VAI:::AAA:::460:::02:10:00:::CRJ:::V,Y:::::::::Z8:::Santa Cruz (VVI):::Salta(SLA)'>
这是我正在使用的 html 表单中的隐藏字段。当我将此 "id" 值作为空值或错误值发送时，我得到一个空字符串结果而不是预期的 html.
在 C# 代码中，我总是得到一个空字符串作为响应。这是我的 C# 代码：
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("https://www.anywebsite.com/reser/server/actu_status.php");
request.Method = "POST";
request.AllowAutoRedirect = false;
request.CookieContainer = cookies;
request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
request.ContentType = "application/x-www-form-urlencoded";
string strNew = "&it=" + it + "&tipo_new=1&id=" + inputValue + "&monto=0&mon=";
var data = Encoding.UTF8.GetBytes(strNew);
using (var stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
var response = (HttpWebResponse)request.GetResponse();
var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
我认为这个 "inputValue" 的编码可能与此有关，我尝试了这两种方式：
1) string strNew = "&it=" + it + "&tipo_new=1&id=" + inputValue + "&monto=0&mon=";
2) string strNew = "&it=" + it + "&tipo_new=1&id=" + HttpUtility.UrlEncode(inputValue) + "&monto=0&mon=";
但其中 none 有效。
您知道是什么导致了这个空字符串结果吗？
请注意，在网络浏览器中，当 "id" 隐藏输入字段的数据不正确时，我也会得到空响应。
是否可以对“:::”字符使用特殊编码？
查看 Fiddler 的两个调用（一个 .html 文件，另一个 c# 代码），区别似乎在于“()”字符：
Html 文件调用：
3a%3a%3aSanta+Cruz+(VVI)%3a%3a%3aSalta(SLA)&monto=0&mon=
已发送 C# 请求：
3A%3ASanta+Cruz+%28VVI%29%3A%3A%3ASalta%28SLA%29&monto=0&mon=
编码不适用于“()”字符？知道它会影响吗？
比较headers：
POST https://www.anysite.com/reserva3/server/actu_estado.php HTTP/1.1
Host: www.anysite.com
Connection: keep-alive
Content-Length: 380
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: null
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.125 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
Accept-Language: es-ES,es;q=0.8,en;q=0.6
Cookie: WebAmaszonas=12a620133f447d1fd126c3bc176eb411; 20011920910-20150729143408-157141320855b91ca0074937-00865209=d433a027559697ffab682c23d799b0a6; 20011920910-20150729145250-68716839655b921024d6852-68684734=236496c8c7338b2f627a8ef232e594ad; 20011920910-20150729145319-101832047555b9211fbac1b4-84013043=462e294432435993d6abd781afedbe83; 20011920910-20150729145353-64952403855b92141797c34-27814538=a53da15223e0aa3738f11287b3e865ba; 20011920910-20150729145413-186346569255b921550c42a1-25690349=761611e26d9a55fd942f9ef096a3f082; 20011920910-20150729151718-96356722455b926bed246b0-24253581=e982ad1989a3d8435c6ae9e5fe19becc; 20011920910-20150729152154-11483789755b927d29a89c7-69865088=d5db38b9fdc3129fb272d2443375cf05; 20011920910-20150729152639-202823217355b928efe950f6-26854157=ca2f211d604ed43e1241d60c6542eb45; 20011920910-20150729152721-101593653455b929195ff4e0-55606804=6fabc92e9a3055fd4ac093cc33279d06; 20011920910-20150729153742-188056231255b92b8686f940-62606835=2e96f159b24b5b530b8985c1633a7534; 20011920910-20150729164914-64775098455b93c4a72d2e1-66426174=c585a55b2be8a312999c204f2591182a; 20011920910-20150729174029-113315944155b9484d134e05-75659750=224ec629dc27eee2287407578698ecff; 20011920910-20150729175035-123576351955b94aabac5d80-96847521=9d49f53a42c274351a9ea08856fec884; 20011920910-20150730110547-80615724155ba3d4b1ddde5-79868945=3e367e93767d39dae60037815ce5dc98; 20011920910-20150730110846-190316769455ba3dfe9ae3b8-00355181=cc2757b9bfd61f8da604057d098365c4; 20011920910-20150730120640-153925119555ba4b905daad6-58863984=fbf9b9189f8eb5c8c699353811206009; 20011920910-20150730155822-106183958655ba81dea52c27-39061829=955ac586630dacfd7958a2c945b517b3; __utma=44289076.1245823098.1438112030.1438271798.1438352283.5; __utmc=44289076; __utmz=44289076.1438271798.4.2.utmcsr=google|utmccn=(organic)|utmcmd=organic|utmctr=(not%20provided); 20011920910-20150731101839-161050305155bb83bfc580f6-88478058=f4f290a7c96f10d6a251cc76c863faeb; 20011920910-20150731101913-144151518355bb83e1e874b3-12891534=8cd2dfa83c7bb6a4a8e9e9f26cb1e08e; 20011920910-20150731101951-195196827255bb8407a66238-65768491=9788783fa71200d225307d55585675d3; 20011920910-20150731102004-27173017555bb8414516340-71888646=820389de93795e6c94efabead492d845; 20011920910-20150731102028-97871570555bb842c84a2a0-94655428=2498720cc1ac2ee970c5e7e10952562c; 20011920910-20150731104252-143815792155bb896c959082-24175470=61bd70cec2d70aa254e099f7a718c5ff; 20011920910-20150731105957-195345078055bb8d6d7f2078-02814471=c5c0b192d70d36cd8303267f2bce8925; 20011920910-20150731104252-143815792155bb896c959082-24175470a=f70bc817d6362383b9bc1fa240396fe1; 20011920910-20150731133128-214572938755bbb0f04252a9-82382000=dd4dfbb4a1e3ea0e56e35256308ce08e; 20011920910-20150731152546-201600117255bbcbba049567-54330748=7bae974ce7eb9325188f333fb1812b5f
it=20011920910-20150731152546-201600117255bbcbba049567-54330748&tipo_new=1&id=11%3A30%3A00%3A%3A%3A16%3A40%3A00%3A%3A%3A2015-08-19+13%3A30%3A00%3A%3A%3A2015-08-19+16%3A40%3A00%3A%3A%3AEscalas+1%3A%3A%3AV%3A%3A%3AVVI%3A%3A%3ASLA%3A%3A%3A460%3A%3A%3A02%3A10%3A00%3A%3A%3ACRJ%3A%3A%3AV%2CY%3A%3A%3A%3A%3A%3A%3A%3A%3AZ8%3A%3A%3ASanta+Cruz+%28VVI%29%3A%3A%3ASalta%28SLA%29&monto=0&mon=
C# 调用：
POST https://www.anysite.com/reservar/server/actu_estado.php HTTP/1.1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.125 Safari/537.36
Accept-Encoding: gzip, deflate
Upgrade-Insecure-Requests: 1
Cache-Control: max-age=0
Origin:
Accept-Language: es-ES,es;q=0.8,en;q=0.6
Host: www.anysite.com
Cookie: 20011920910-20150731161313-197603319955bbd6d90fbb13-41505311=4e901d35a856baef9b00ed3500d89113
Content-Length: 384
Connection: Keep-Alive
it=20011920910-20150731161313-197603319955bbd6d90fbb13-41505311&tipo_new=1&id=13%3a30%3a00%3a%3a%3a16%3a40%3a00%3a%3a%3a2015-08-14+13%3a30%3a00%3a%3a%3a2015-08-14+16%3a40%3a00%3a%3a%3aEscalas+1%3a%3a%3aV%3a%3a%3aVVI%3a%3a%3aSLA%3a%3a%3a460%3a%3a%3a02%3a10%3a00%3a%3a%3aCRJ%3a%3a%3aH%2cV%2cY%3a%3a%3a%3a%3a%3a%3a%3a%3aZ8%3a%3a%3aSanta+Cruz+%28VVI%29%3a%3a%3aSalta%28SLA%29&monto=0&mon=
用System.Web.HttpUtility.UrlEncode包裹你所有的数据。
string strNew = "&it=" + it + "&tipo_new=1&id=" + inputValue + "&monto=0&mon=";
strNew = System.Web.HttpUtility.UrlEncode(strNew);
问：编码不适用于“()”字符？
编码 工作正常。 Encoding.UTF8.GetBytes() 正确地将 '(' 编码为 '%28' 并将 ')' 编码为“%29”`
问：有什么想法可以影响吗？
它应该不会有任何影响。来自 RFC 1738、
"Thus, only alphanumerics, the special characters "$-_.+!*'(),", and
reserved characters used for their reserved purposes may be used
unencoded within a URL.
On the other hand, characters that are not required to be encoded
(including alphanumerics) may be encoded within the scheme-specific
part of a URL, as long as they are not being used for a reserved
purpose."
您发布的客户端代码看起来不错。我能够使用您的代码并成功地将字符串传递给服务器。所以在服务器端，如果我执行以下操作，
var httpRequest = HttpContext.Current.Request;
string inputString = "2015-08-19 13:30:00:::2015-08-19 16:40:00:::Estarder 1:::V:::VAI:::AAA:::460:::02:10:00:::CRJ:::V,Y:::::::::Z8:::Santa Cruz (VVI):::Salta(SLA)";
if (httpRequest.Form["id"] == inputString)
return Ok("Good");
然后我得到 responseString 作为 "Good"（如预期的那样）
现在为什么您的服务器没有正确响应是一个单独的问题，我认为您需要提供服务器端处理您的请求的详细信息。
此外，您关注的是 inputValue 字符串，但您确定 strNew 字符串的其他部分没有问题（例如， it 字符串是什么） ？
我正在尝试 post 将数据形成到外部 url 以检索 html 响应。 当我尝试使用 .html 文件中的 html 表单元素 post 这些值时，它工作正常。 但是，当尝试使用 C# HttpWebRequest post 相同的值时，它不起作用。 有问题的变量是这样的：
<input type="hidden" name="id" id="id" value='2015-08-19 13:30:00:::2015-08-19 16:40:00:::Estarder 1:::V:::VAI:::AAA:::460:::02:10:00:::CRJ:::V,Y:::::::::Z8:::Santa Cruz (VVI):::Salta(SLA)'>
这是我正在使用的 html 表单中的隐藏字段。当我将此 "id" 值作为空值或错误值发送时，我得到一个空字符串结果而不是预期的 html.
在 C# 代码中，我总是得到一个空字符串作为响应。这是我的 C# 代码：
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("https://www.anywebsite.com/reser/server/actu_status.php");
request.Method = "POST";
request.AllowAutoRedirect = false;
request.CookieContainer = cookies;
request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
request.ContentType = "application/x-www-form-urlencoded";
string strNew = "&it=" + it + "&tipo_new=1&id=" + inputValue + "&monto=0&mon=";
var data = Encoding.UTF8.GetBytes(strNew);
using (var stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
var response = (HttpWebResponse)request.GetResponse();
var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
我认为这个 "inputValue" 的编码可能与此有关，我尝试了这两种方式：
1) string strNew = "&it=" + it + "&tipo_new=1&id=" + inputValue + "&monto=0&mon=";
2) string strNew = "&it=" + it + "&tipo_new=1&id=" + HttpUtility.UrlEncode(inputValue) + "&monto=0&mon=";
但其中 none 有效。
您知道是什么导致了这个空字符串结果吗？ 请注意，在网络浏览器中，当 "id" 隐藏输入字段的数据不正确时，我也会得到空响应。
是否可以对“:::”字符使用特殊编码？
查看 Fiddler 的两个调用（一个 .html 文件，另一个 c# 代码），区别似乎在于“()”字符： Html 文件调用：
3a%3a%3aSanta+Cruz+(VVI)%3a%3a%3aSalta(SLA)&monto=0&mon=
已发送 C# 请求：
3A%3ASanta+Cruz+%28VVI%29%3A%3A%3ASalta%28SLA%29&monto=0&mon=
编码不适用于“()”字符？知道它会影响吗？
比较headers：
POST https://www.anysite.com/reserva3/server/actu_estado.php HTTP/1.1
Host: www.anysite.com
Connection: keep-alive
Content-Length: 380
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: null
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.125 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
Accept-Language: es-ES,es;q=0.8,en;q=0.6
Cookie: WebAmaszonas=12a620133f447d1fd126c3bc176eb411; 20011920910-20150729143408-157141320855b91ca0074937-00865209=d433a027559697ffab682c23d799b0a6; 20011920910-20150729145250-68716839655b921024d6852-68684734=236496c8c7338b2f627a8ef232e594ad; 20011920910-20150729145319-101832047555b9211fbac1b4-84013043=462e294432435993d6abd781afedbe83; 20011920910-20150729145353-64952403855b92141797c34-27814538=a53da15223e0aa3738f11287b3e865ba; 20011920910-20150729145413-186346569255b921550c42a1-25690349=761611e26d9a55fd942f9ef096a3f082; 20011920910-20150729151718-96356722455b926bed246b0-24253581=e982ad1989a3d8435c6ae9e5fe19becc; 20011920910-20150729152154-11483789755b927d29a89c7-69865088=d5db38b9fdc3129fb272d2443375cf05; 20011920910-20150729152639-202823217355b928efe950f6-26854157=ca2f211d604ed43e1241d60c6542eb45; 20011920910-20150729152721-101593653455b929195ff4e0-55606804=6fabc92e9a3055fd4ac093cc33279d06; 20011920910-20150729153742-188056231255b92b8686f940-62606835=2e96f159b24b5b530b8985c1633a7534; 20011920910-20150729164914-64775098455b93c4a72d2e1-66426174=c585a55b2be8a312999c204f2591182a; 20011920910-20150729174029-113315944155b9484d134e05-75659750=224ec629dc27eee2287407578698ecff; 20011920910-20150729175035-123576351955b94aabac5d80-96847521=9d49f53a42c274351a9ea08856fec884; 20011920910-20150730110547-80615724155ba3d4b1ddde5-79868945=3e367e93767d39dae60037815ce5dc98; 20011920910-20150730110846-190316769455ba3dfe9ae3b8-00355181=cc2757b9bfd61f8da604057d098365c4; 20011920910-20150730120640-153925119555ba4b905daad6-58863984=fbf9b9189f8eb5c8c699353811206009; 20011920910-20150730155822-106183958655ba81dea52c27-39061829=955ac586630dacfd7958a2c945b517b3; __utma=44289076.1245823098.1438112030.1438271798.1438352283.5; __utmc=44289076; __utmz=44289076.1438271798.4.2.utmcsr=google|utmccn=(organic)|utmcmd=organic|utmctr=(not%20provided); 20011920910-20150731101839-161050305155bb83bfc580f6-88478058=f4f290a7c96f10d6a251cc76c863faeb; 20011920910-20150731101913-144151518355bb83e1e874b3-12891534=8cd2dfa83c7bb6a4a8e9e9f26cb1e08e; 20011920910-20150731101951-195196827255bb8407a66238-65768491=9788783fa71200d225307d55585675d3; 20011920910-20150731102004-27173017555bb8414516340-71888646=820389de93795e6c94efabead492d845; 20011920910-20150731102028-97871570555bb842c84a2a0-94655428=2498720cc1ac2ee970c5e7e10952562c; 20011920910-20150731104252-143815792155bb896c959082-24175470=61bd70cec2d70aa254e099f7a718c5ff; 20011920910-20150731105957-195345078055bb8d6d7f2078-02814471=c5c0b192d70d36cd8303267f2bce8925; 20011920910-20150731104252-143815792155bb896c959082-24175470a=f70bc817d6362383b9bc1fa240396fe1; 20011920910-20150731133128-214572938755bbb0f04252a9-82382000=dd4dfbb4a1e3ea0e56e35256308ce08e; 20011920910-20150731152546-201600117255bbcbba049567-54330748=7bae974ce7eb9325188f333fb1812b5f
it=20011920910-20150731152546-201600117255bbcbba049567-54330748&tipo_new=1&id=11%3A30%3A00%3A%3A%3A16%3A40%3A00%3A%3A%3A2015-08-19+13%3A30%3A00%3A%3A%3A2015-08-19+16%3A40%3A00%3A%3A%3AEscalas+1%3A%3A%3AV%3A%3A%3AVVI%3A%3A%3ASLA%3A%3A%3A460%3A%3A%3A02%3A10%3A00%3A%3A%3ACRJ%3A%3A%3AV%2CY%3A%3A%3A%3A%3A%3A%3A%3A%3AZ8%3A%3A%3ASanta+Cruz+%28VVI%29%3A%3A%3ASalta%28SLA%29&monto=0&mon=
C# 调用：
POST https://www.anysite.com/reservar/server/actu_estado.php HTTP/1.1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.125 Safari/537.36
Accept-Encoding: gzip, deflate
Upgrade-Insecure-Requests: 1
Cache-Control: max-age=0
Origin:
Accept-Language: es-ES,es;q=0.8,en;q=0.6
Host: www.anysite.com
Cookie: 20011920910-20150731161313-197603319955bbd6d90fbb13-41505311=4e901d35a856baef9b00ed3500d89113
Content-Length: 384
Connection: Keep-Alive
it=20011920910-20150731161313-197603319955bbd6d90fbb13-41505311&tipo_new=1&id=13%3a30%3a00%3a%3a%3a16%3a40%3a00%3a%3a%3a2015-08-14+13%3a30%3a00%3a%3a%3a2015-08-14+16%3a40%3a00%3a%3a%3aEscalas+1%3a%3a%3aV%3a%3a%3aVVI%3a%3a%3aSLA%3a%3a%3a460%3a%3a%3a02%3a10%3a00%3a%3a%3aCRJ%3a%3a%3aH%2cV%2cY%3a%3a%3a%3a%3a%3a%3a%3a%3aZ8%3a%3a%3aSanta+Cruz+%28VVI%29%3a%3a%3aSalta%28SLA%29&monto=0&mon=
用System.Web.HttpUtility.UrlEncode包裹你所有的数据。
string strNew = "&it=" + it + "&tipo_new=1&id=" + inputValue + "&monto=0&mon=";
strNew = System.Web.HttpUtility.UrlEncode(strNew);
问：编码不适用于“()”字符？
编码 工作正常。 Encoding.UTF8.GetBytes() 正确地将 '(' 编码为 '%28' 并将 ')' 编码为“%29”`
问：有什么想法可以影响吗？
它应该不会有任何影响。来自 RFC 1738、
"Thus, only alphanumerics, the special characters "$-_.+!*'(),", and reserved characters used for their reserved purposes may be used unencoded within a URL.
On the other hand, characters that are not required to be encoded (including alphanumerics) may be encoded within the scheme-specific part of a URL, as long as they are not being used for a reserved purpose."
您发布的客户端代码看起来不错。我能够使用您的代码并成功地将字符串传递给服务器。所以在服务器端，如果我执行以下操作，
var httpRequest = HttpContext.Current.Request;
string inputString = "2015-08-19 13:30:00:::2015-08-19 16:40:00:::Estarder 1:::V:::VAI:::AAA:::460:::02:10:00:::CRJ:::V,Y:::::::::Z8:::Santa Cruz (VVI):::Salta(SLA)";
if (httpRequest.Form["id"] == inputString)
return Ok("Good");
然后我得到 responseString 作为 "Good"（如预期的那样）
现在为什么您的服务器没有正确响应是一个单独的问题，我认为您需要提供服务器端处理您的请求的详细信息。
此外，您关注的是 inputValue 字符串，但您确定 strNew 字符串的其他部分没有问题（例如， it 字符串是什么） ？