如何在YouTube API v3中通过Classic ASP传递xmlHttp对象

Looking at your code snippet, there are a few key mistakes that are likely causing issues with the YouTube API v3 resumable upload. Let’s break down the fixes and provide a complete working example tailored to Classic ASP.

Common Issues in Your Original Code #

• Incomplete open() URL: You’re passing just the base https://www.googleapis.com to open(), but you need to include the full endpoint path here instead of trying to set it via a header.
• Invalid POST header: The line setRequestHeader("POST", "...") is not valid—HTTP method is specified in the open() call, not as a request header.
• Missing Content-Type header: Since you’re sending a JSON payload for the video snippet, you need to explicitly set Content-Type: application/json.
• Truncated headers: Your code cuts off mid-header setup, so ensure all required headers (like content type for the video file) are included.

Corrected Code Example #

Here’s a full, functional snippet for initiating a resumable upload session with YouTube API v3 in Classic ASP:

<%
Dim xmlHttp, URLString, jsonString, ACCESS_TOKEN

' Replace with your valid access token (must have youtube.upload scope)
ACCESS_TOKEN = "YOUR_VALID_ACCESS_TOKEN"

' Build the full resumable upload endpoint
URLString = "https://www.googleapis.com/upload/youtube/v3/videos?uploadType=resumable&part=snippet,status,contentDetails"

' Create the latest version of the XMLHTTP object for better compatibility
Set xmlHttp = CreateObject("MSXML2.ServerXMLHTTP.6.0")

' Initialize synchronous POST request
Call xmlHttp.open("POST", URLString, False)

' Set required request headers
Call xmlHttp.setRequestHeader("Host", "www.googleapis.com")
Call xmlHttp.setRequestHeader("Authorization", "Bearer " & ACCESS_TOKEN)
Call xmlHttp.setRequestHeader("Content-Type", "application/json")
Call xmlHttp.setRequestHeader("X-Upload-Content-Type", "video/mp4") ' Replace with your video's MIME type
Call xmlHttp.setRequestHeader("X-Upload-Content-Length", "123456789") ' Replace with actual video file size in bytes

' Define your video metadata as properly formatted JSON
jsonString = "{" & _
    """snippet"": {" & _
        """title"": ""My Classic ASP Uploaded Video""," & _
        """description"": ""Test video uploaded via Classic ASP and YouTube API v3""," & _
        """tags"": [""classic asp"", ""youtube api"", ""resumable upload"" ]," & _
        """categoryId"": ""22"" " & ' Replace with your desired category ID
    "}," & _
    """status"": {" & _
        """privacyStatus"": ""unlisted"" " & ' Options: public, private, unlisted
    "}" & _
"}"

' Send the metadata payload to initiate the session
Call xmlHttp.send(jsonString)

' Handle the response
If xmlHttp.Status = 200 Then
    ' Extract the resumable session URL from the Location header
    Dim sessionUrl
    sessionUrl = xmlHttp.getResponseHeader("Location")
    Response.Write("Resumable session created successfully! Session URL: <br>" & sessionUrl)
    
    ' Next step: Use this session URL to upload the actual video file via a PUT request
    ' (You'll need to read the video file as binary and send it with the correct Content-Length header)
Else
    ' Output error details for debugging
    Response.Write("Error initiating session: " & xmlHttp.Status & " " & xmlHttp.StatusText & "<br>")
    Response.Write("API Response: <br>" & xmlHttp.responseText)
End If

' Clean up the object
Set xmlHttp = Nothing
%>

Key Notes to Avoid Pitfalls #

• Access Token Scope: Your access token must include the https://www.googleapis.com/auth/youtube.upload scope—without this, you’ll get authorization errors.
• Resumable Flow: This code only starts the session. To upload the video file, you need to make a PUT request to the sessionUrl returned, sending the binary video data with the exact Content-Length you specified earlier.
• XMLHTTP Version: Use MSXML2.ServerXMLHTTP.6.0 instead of older versions to ensure compatibility with modern HTTPS endpoints and TLS requirements.
• JSON Validation: Double-check your JSON string for syntax errors (missing commas, unescaped quotes)—even small mistakes will cause the API to reject the request.
• Error Handling: Always check the Status and StatusText properties to catch network issues or API errors early.

内容的提问来源于stack exchange，提问作者Already