WebRequest.GetResponse（）正在获取“底层连接已关闭”]]

Question

我建立了WebRequest对象，然后在其上调用GetResponse（）。网址为“https://services.odata.org/V2/Northwind/Northwind.svc/$ metadata”。

并且它在浏览器中很好显示。真正奇怪的是，这些返回200，所以应该很好。但是没有数据返回。

根据Fiddler，有两个请求发出：

请求＃1

A SSLv3-compatible ClientHello handshake was found. Fiddler extracted the parameters below.

Version: 3.1 (TLS/1.0)
Random: 5E 5B 1A 26 84 02 5A 4B DF 6B BF 22 DF 2C 03 AD 37 62 DA CE 05 79 7E B4 5C 58 AF BE 8C 26 5D CA
"Time": 4/4/1990 2:38:54 PM
SessionID: empty
Extensions: 
    server_name services.odata.org
    supported_groups    x25519 [0x1d], secp256r1 [0x17], secp384r1 [0x18]
    ec_point_formats    uncompressed [0x0]
    SessionTicket   empty
    extended_master_secret  empty
    renegotiation_info  00
Ciphers: 
    [C00A]  TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
    [C009]  TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
    [C014]  TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
    [C013]  TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
    [0035]  TLS_RSA_WITH_AES_256_CBC_SHA
    [002F]  TLS_RSA_WITH_AES_128_CBC_SHA
    [000A]  SSL_RSA_WITH_3DES_EDE_SHA

Compression: 
    [00]    NO_COMPRESSION
响应＃1

请求＃2

A SSLv3-compatible ClientHello handshake was found. Fiddler extracted the parameters below.

Version: 3.1 (TLS/1.0)
Random: 5E 5B 1A 26 0D B0 9F BF 4F D8 FC 5D 27 47 A8 7C CB 83 2C 43 4C 2B C3 8A 0C C0 EB 30 3D 6E AB 51
"Time": 4/4/1990 2:38:54 PM
SessionID: empty
Extensions: 
    server_name services.odata.org
    supported_groups    x25519 [0x1d], secp256r1 [0x17], secp384r1 [0x18]
    ec_point_formats    uncompressed [0x0]
    SessionTicket   empty
    extended_master_secret  empty
    renegotiation_info  00
Ciphers: 
    [C00A]  TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
    [C009]  TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
    [C014]  TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
    [C013]  TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
    [0035]  TLS_RSA_WITH_AES_256_CBC_SHA
    [002F]  TLS_RSA_WITH_AES_128_CBC_SHA
    [000A]  SSL_RSA_WITH_3DES_EDE_SHA

Compression: 
    [00]    NO_COMPRESSION
响应＃2

我建立了WebRequest对象，然后在其上调用GetResponse（）。网址为“ https://services.odata.org/V2/Northwind/Northwind.svc/$metadata”。它可以在浏览器中正常运行。到底是什么奇怪的东西]

Answer 1

这是TLS级别。只需添加：