chatgpt 01

 ok so when my application setavtransportURI and than panasonic is reponse SetAVTransportURIResponse OK. than my panasonic check head using this : HEAD /b420bda59b57dd1757169be92435a3d7 host : 192.168.88.235:26607 getcontentfeatures.dlna.org : 1 user-agent : Panasonic MIL DLNA CP UPnP/1.0 DLNADOC/1.50 so what to reponse to this ?

ChatGPT said:

When your Panasonic device sends a HEAD request after the SetAVTransportURI call, it is checking for metadata and DLNA-specific compatibility features of the requested resource. The server (your application) should respond appropriately with relevant headers to satisfy the device's expectations.

Here's a breakdown of what you need to include in your response:

---

Purpose of the HEAD Request

• The HEAD request is used to fetch metadata about the requested resource without transferring the actual content.
• It is often a precursor to a GET request, ensuring that the server supports the necessary features (e.g., streaming, DLNA compliance, file size).

---

Key Response Headers

You should respond with the following headers at a minimum:

1. Content-Length

• Indicates the size of the resource in bytes.
• Example:

  http
  Content-Length: 12345678
  

2. Content-Type

• Specifies the MIME type of the resource.
• For a .ts video file, use:

  http
  Content-Type: video/mp2t
  

3. Content-Features.DLNA.ORG

• Communicates DLNA-specific features of the resource.
• Example:

  http
  Content-Features.DLNA.ORG: DLNA.ORG_PN=MPEG_TS_HD_EU_ISO;DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=01700000000000000000000000000000
  

  • DLNA.ORG_PN: Profile name for the content (e.g., MPEG_TS_HD_EU_ISO).
  • DLNA.ORG_OP: Operations supported:
    • 01: Time-based seeking.
    • 10: Byte-based seeking.
    • 00: No seeking.
  • DLNA.ORG_CI: Conversion indicator (0 for native format, 1 for transcoded).
  • DLNA.ORG_FLAGS: Flags for features like streaming, interactive playback, and more.

4. Accept-Ranges

• Indicates support for partial content requests (e.g., seeking).
• Example:

  http
  Accept-Ranges: bytes
  

5. Date

• Provides the current date and time of the server.
• Example:

  http
  Date: Mon, 06 Dec 2024 12:00:00 GMT
  

6. Connection

• Indicates whether the connection should be kept alive.
• Example:

  http
  Connection: keep-alive
  

---

Full Example Response

http
HTTP/1.1 200 OK
Content-Length: 12345678
Content-Type: video/mp2t
Content-Features.DLNA.ORG: DLNA.ORG_PN=MPEG_TS_HD_EU_ISO;DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=01700000000000000000000000000000
Accept-Ranges: bytes
Date: Mon, 06 Dec 2024 12:00:00 GMT
Connection: keep-alive