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(Tcl) Send JSON REST Request, Get JSON Response

Demonstrates sending a RESTful JSON request, and receiving a JSON response. This example will create a bucket in Google Cloud Storage (which involves sending and receiving JSON).

Chilkat Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

# This example will create a bucket in Google Cloud Storage.

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

set gAuth [new_CkAuthGoogle]

# Obtain an access token as shown in one of the following examples:
# See Get Access Token using a Service Account JSON Key
# See Get Access Token using a P12 File

set rest [new_CkRest]

# Connect using TLS.
set bAutoReconnect 1
set success [CkRest_Connect $rest "www.googleapis.com" 443 1 $bAutoReconnect]

# Provide the authentication credentials (i.e. the access key)
set success [CkRest_SetAuthGoogle $rest $gAuth]

# Build the JSON request body for creating a bucket.
# The only required property is the "name", but we'll add more
# to make a better example..
set jsonReqBody [new_CkJsonObject]

set success [CkJsonObject_AddStringAt $jsonReqBody -1 "name" "chilkat-bucket-c"]
set success [CkJsonObject_AddStringAt $jsonReqBody -1 "kind" "storage#bucket"]
set success [CkJsonObject_AddStringAt $jsonReqBody -1 "location" "US"]
set success [CkJsonObject_AddObjectAt $jsonReqBody -1 "versioning"]

# pObjVersioning is a CkJsonObject
set pObjVersioning [CkJsonObject_ObjectOf $jsonReqBody "versioning"]
set success [CkJsonObject_AddBoolAt $pObjVersioning -1 "enabled" 1]
delete_CkJsonObject $pObjVersioning

# Show the HTTP request body we'll be sending.
puts [CkJsonObject_emit $jsonReqBody]

# Add the required query parameter.
# See https://cloud.google.com/storage/docs/json_api/v1/buckets/insert
set success [CkRest_AddQueryParam $rest "project" "chilkattest-1050"]

# Add the Content-Type HTTP request header.
set success [CkRest_AddHeader $rest "Content-Type" "application/json; charset=UTF-8"]

set jsonResponseStr [CkRest_fullRequestString $rest "POST" "/storage/v1/b" [CkJsonObject_emit $jsonReqBody]]
if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkAuthGoogle $gAuth
    delete_CkRest $rest
    delete_CkJsonObject $jsonReqBody
    exit
}

# Show the JSON response.  (See below for a sample JSON response.)
puts "Json Response: $jsonResponseStr"

# {
#  "kind": "storage#bucket",
#  "id": "chilkat-bucket-c",
#  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket-c",
#  "projectNumber": "999992999999",
#  "name": "chilkat-bucket-c",
#  "timeCreated": "2016-04-29T21:08:10.451Z",
#  "updated": "2016-04-29T21:08:10.451Z",
#  "metageneration": "1",
#  "owner": {
#   "entity": "project-owners-999992999999"
#  },
#  "location": "US",
#  "versioning": {
#   "enabled": true
#  },
#  "storageClass": "STANDARD",
#  "etag": "CAE="
# }
# 

delete_CkAuthGoogle $gAuth
delete_CkRest $rest
delete_CkJsonObject $jsonReqBody

 

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