(Tcl) Upload Media for Google Photos

Demonstrates how to upload a media file (such as a JPG image) that will be placed in a Google Photos album. Uploading is a two-step process:

1. Upload the raw bytes to a Google Server. This doesn't result in any media items being created in the user’s Google Photos account. Instead, it returns an upload token which identifies the uploaded bytes.
2. Use the upload token to create the media item in the user’s Google Photos account. You can choose whether the media should be also added to a specific album.

This example shows step 1.

Chilkat Tcl Extension Downloads Chilkat Tcl Extension Downloads

load ./chilkat.dll

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# Get the previously obtained access token.
# See Get Google Photos Access Token.

set jsonToken [new_CkJsonObject]

set success [CkJsonObject_LoadFile $jsonToken "qa_data/tokens/googlePhotos.json"]
if {$success == 0} then {
    puts [CkJsonObject_lastErrorText $jsonToken]
    delete_CkJsonObject $jsonToken
    exit
}

set http [new_CkHttp]

CkHttp_put_AuthToken $http [CkJsonObject_stringOf $jsonToken "access_token"]

# This is the HTTPS POST we'll be sending:
# POST https://photoslibrary.googleapis.com/v1/uploads
# Authorization: Bearer OAUTH2_TOKEN
# Content-type: application/octet-stream
# X-Goog-Upload-File-Name: FILENAME
# X-Goog-Upload-Protocol: raw

CkHttp_SetRequestHeader $http "X-Goog-Upload-File-Name" "penguins.jpg"
CkHttp_SetRequestHeader $http "X-Goog-Upload-Protocol" "raw"

# Assuming the media isn't super large, we'll just read it into memory and send.
# (Another example exists for streaming a large media file directly from the filesystem.)

# Load the media file into memory.
set bdMedia [new_CkBinData]

set success [CkBinData_LoadFile $bdMedia "qa_data/jpg/penguins.jpg"]

set url "https://photoslibrary.googleapis.com/v1/uploads"
# resp is a CkHttpResponse
set resp [CkHttp_PBinaryBd $http "POST" $url $bdMedia "application/octet-stream" 0 0]
if {[CkHttp_get_LastMethodSuccess $http] == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkJsonObject $jsonToken
    delete_CkHttp $http
    delete_CkBinData $bdMedia
    exit
}

# Examine the response status code.  Success is indicated by a status code of 200.
puts "response status code: [CkHttpResponse_get_StatusCode $resp]"

# Show the response body.
if {[CkHttpResponse_get_StatusCode $resp] == 200} then {
    # Success.
    puts "Upload token: [CkHttpResponse_bodyStr $resp]"
} else {
    puts "Error:"
    puts [CkHttpResponse_bodyStr $resp]
}

delete_CkHttpResponse $resp

# Clear headers such as X-Goog-Upload-File-Name for subsequent HTTP requests sent on this object..
CkHttp_ClearHeaders $http

delete_CkJsonObject $jsonToken
delete_CkHttp $http
delete_CkBinData $bdMedia