Golang 的 HTTP POST 请求失败，返回 400 状态码，而 cURL 和 Postman 正常工作

我正在尝试通过 HTTP POST 以 JSON 格式发送 GooglePay 令牌。该请求在 cURL 和 Postman 上工作正常，但当我尝试使用 Go HTTP 请求时，服务器抱怨数据格式无效，HTTP 响应状态代码为 400。

cURL

curl --verbose --location 'https://fts-uat.cardconnect.com/cardsecure/api/v1/ccn/tokenize' 
    --header 'Content-Type: application/json' 
    --data '{
    "encryptionhandler": "EC_GOOGLE_PAY",
    "devicedata": "{"signature":"MEQCIDTsnaYiwckYQFYky0i0wSn317HcKuAYrNYfh4Uw6Y4lAiAhDPxmheYFOEDGVYjVjZnPFHOrbYHwDUbkcYIxZDqU/w\u003d\u003d","intermediateSigningKey":{"signedKey":"{\"keyValue\":\"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEYD8gO936PEY6yEFDQolKLMcpKvjo1uZEdnKZ022tUOAERQKaEpoT6RAd6nDm1FbbFRUdionunr3vy/o72nSQ6w\\u003d\\u003d\",\"keyExpiration\":\"1701182324996\"}","signatures":["MEUCIQCbEHBbAXI/WEfguCnTkYYwgQeFZcN4/oBS8O79oQGl4wIgOmXKIihg6Ia9b7bUJckKAGrPF70fHZjCJcPGv88MMjA\u003d"]},"protocolVersion":"ECv2","signedMessage":"{\"encryptedMessage\":\"ynexar8PqRG3y1zKbNBUbbwRHbAbElnk2imema+8Zx89ex91/pgdy5ZzZKNhJ+LHJonuQKvdI9h0gWikhap7Jp6kqrnu0b4OzMxrRoj5wteUzDmm77F7WsBxi2DkIsqzcReDBZiTO3BSrJwvIkeL8mYr2yfVTZ0qY3KqCqXkzx0ANT3mZEdltqSEGOKaJKV38S1Oq0vGzQCKLxFI7Cxz5RHlTIM0WfBUigALfa+yJO4J6Tev0d4e9CYChz5DA/sBKxPf37796IxmvxxvNpytVqXYHKQWg6iAVfeKs8wbR6KA12mb6zqwTOrrLBrnLWdaBbX12flyvPFVywSJFHzTkV8WEB9mVoKrm/A2b27UV8RGFNrr9djCE1FZIgyS36VJVefLKlWQkeSGNESuLn0d7ftkv92+Gds2Hl9TQbAyy+IcGVERmQPo2EOhxf1xOpSQU8bTxLIFr+WqzGM0Q1+PquqxzQ\\u003d\\u003d\",\"ephemeralPublicKey\":\"BMAjXpWcm+kQlvIMzdhAnOJK+5RViyCaPA35gXTJGvW5pKZ6zDxD14cQYHfhccJZli24Fc+JbqnvIvtc6Yo19d8\\u003d\",\"tag\":\"3ZumWWU6hOw+f5V5GIKr6di4AkA0s3kzigqP3V1YzVo\\u003d\"}"}"
}'

Go语言

url := "https://fts-uat.cardconnect.com/cardsecure/api/v1/ccn/tokenize"

    data := `{
        "encryptionhandler": "EC_GOOGLE_PAY",
        "devicedata": "{"signature":"MEQCIDTsnaYiwckYQFYky0i0wSn317HcKuAYrNYfh4Uw6Y4lAiAhDPxmheYFOEDGVYjVjZnPFHOrbYHwDUbkcYIxZDqU/w\u003d\u003d","intermediateSigningKey":{"signedKey":"{\"keyValue\":\"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEYD8gO936PEY6yEFDQolKLMcpKvjo1uZEdnKZ022tUOAERQKaEpoT6RAd6nDm1FbbFRUdionunr3vy/o72nSQ6w\\u003d\\u003d\",\"keyExpiration\":\"1701182324996\"}","signatures":["MEUCIQCbEHBbAXI/WEfguCnTkYYwgQeFZcN4/oBS8O79oQGl4wIgOmXKIihg6Ia9b7bUJckKAGrPF70fHZjCJcPGv88MMjA\u003d"]},"protocolVersion":"ECv2","signedMessage":"{\"encryptedMessage\":\"ynexar8PqRG3y1zKbNBUbbwRHbAbElnk2imema+8Zx89ex91/pgdy5ZzZKNhJ+LHJonuQKvdI9h0gWikhap7Jp6kqrnu0b4OzMxrRoj5wteUzDmm77F7WsBxi2DkIsqzcReDBZiTO3BSrJwvIkeL8mYr2yfVTZ0qY3KqCqXkzx0ANT3mZEdltqSEGOKaJKV38S1Oq0vGzQCKLxFI7Cxz5RHlTIM0WfBUigALfa+yJO4J6Tev0d4e9CYChz5DA/sBKxPf37796IxmvxxvNpytVqXYHKQWg6iAVfeKs8wbR6KA12mb6zqwTOrrLBrnLWdaBbX12flyvPFVywSJFHzTkV8WEB9mVoKrm/A2b27UV8RGFNrr9djCE1FZIgyS36VJVefLKlWQkeSGNESuLn0d7ftkv92+Gds2Hl9TQbAyy+IcGVERmQPo2EOhxf1xOpSQU8bTxLIFr+WqzGM0Q1+PquqxzQ\\u003d\\u003d\",\"ephemeralPublicKey\":\"BMAjXpWcm+kQlvIMzdhAnOJK+5RViyCaPA35gXTJGvW5pKZ6zDxD14cQYHfhccJZli24Fc+JbqnvIvtc6Yo19d8\\u003d\",\"tag\":\"3ZumWWU6hOw+f5V5GIKr6di4AkA0s3kzigqP3V1YzVo\\u003d\"}"}"
    }`

    req, _ := http.NewRequest(http.MethodPost, url, strings.NewReader(data))
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }

    fmt.Println("Response Status:", resp.Status)

我尝试使用 nc 打印来自 cURL、Postman 和 GoLang 的所有 HTTP 标头和正文，它们看起来相同。我还操纵了用户代理以保持一致，但还没有运气。感谢任何帮助。

正确答案

简短回答

添加此：

req.ContentLength = 0

长答案

天知道什么原因，服务器只接受Transfer-Encoding：chunked。所以当您发送“正常”请求时，它看起来像这样 失败：

POST /cardsecure/api/v1/ccn/tokenize HTTP/1.1
Host: fts-uat.cardconnect.com
Content-Length: 1373

当您添加上述代码时，它看起来像这样并通过：

POST /cardsecure/api/v1/ccn/tokenize HTTP/1.1
Host: fts-uat.cardconnect.com
Transfer-Encoding: chunked