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template.tpl
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template.tpl
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___INFO___
{
"type": "CLIENT",
"id": "cvt_temp_public_id",
"version": 1,
"securityGroups": [],
"displayName": "Proxy - gtm.js",
"brand": {
"id": "brand_dummy",
"displayName": ""
},
"description": "Proxy gtm.js from the Google servers and optionally adjust the request path of gtm.js.",
"containerContexts": [
"SERVER"
]
}
___TEMPLATE_PARAMETERS___
[
{
"type": "TEXT",
"name": "pathnameGtm",
"displayName": "Custom pathname gtm.js",
"simpleValueType": true,
"defaultValue": "/gtm.js",
"help": "Pathname, start with /",
"valueValidators": [
{
"type": "REGEX",
"args": [
"^/.*$"
]
}
]
},
{
"type": "SIMPLE_TABLE",
"name": "allowedContainerIds",
"displayName": "Allowed GTM Container-IDs",
"simpleTableColumns": [
{
"defaultValue": "",
"displayName": "",
"name": "gtm_container_id",
"type": "TEXT"
}
],
"help": "Enter GTM-Container-IDs that are allowed to fetched fromt the Google servers and returned to the browser."
}
]
___SANDBOXED_JS_FOR_SERVER___
const claimRequest = require('claimRequest');
const getGoogleScript = require('getGoogleScript');
const getRequestHeader = require('getRequestHeader');
const getRequestPath = require('getRequestPath');
const getRequestQueryParameters = require('getRequestQueryParameters');
const setResponseBody = require('setResponseBody');
const setResponseStatus = require('setResponseStatus');
const setResponseHeader = require('setResponseHeader');
const sendHttpGet = require('sendHttpGet');
const returnResponse = require('returnResponse');
const httpEndpoint = 'https://www.googletagmanager.com/gtm.js?fps=s';
const pathname = data.pathnameGtm || '/gtm.js';
// Check the configured requestpath for the gtm.js library
if (getRequestPath() == pathname) {
// Claim the requst
claimRequest();
const allowedContainerIds = data.allowedContainerIds;
const allowedContainerIdsArray = [];
const queryParameters = getRequestQueryParameters();
const gtmContainerId = queryParameters.id;
const gtmAuth = queryParameters.gtm_auth;
const gtmPreview = queryParameters.gtm_preview;
const gtmDebug = queryParameters.gtm_debug;
const gtmDatalayerName = queryParameters.l || 'dataLayer';
for (let i=0; i < allowedContainerIds.length; i++) {
allowedContainerIdsArray.push(allowedContainerIds[i].gtm_container_id);
}
if (allowedContainerIdsArray.indexOf(gtmContainerId) !== -1) {
if (!!(gtmAuth && gtmDebug && gtmPreview)) {
// See https://www.simoahava.com/analytics/custom-gtm-loader-server-side-tagging/. No support in the getGoogleScript API for previewing containers.
sendHttpGet(httpEndpoint + '&id=' + gtmContainerId + '&l=' + gtmDatalayerName + '>m_auth=' + gtmAuth + '>m_debug=' + gtmDebug + '>m_preview=' + gtmPreview, (statusCode, headers, body) => {
setResponseStatus(statusCode);
setResponseBody(body);
for (const key in headers) {
// Do not set the "expires" and "date" headers
if (['expires', 'date'].indexOf(key) === -1) setResponseHeader(key, headers[key]);
}
returnResponse();
}, {timeout: 1500});
} else {
getGoogleScript('GTM', (script, metadata) => {
// Pass headers
for (let header in metadata) {
setResponseHeader(header, metadata[header]);
}
setResponseHeader('content-type', 'text/javascript');
setResponseBody(script);
// Handle CORS
const origin = getRequestHeader('Origin');
if (origin) {
setResponseHeader('Access-Control-Allow-Origin', origin);
setResponseHeader('Access-Control-Allow-Credentials', 'true');
}
// Return the response
returnResponse();
}, {'id': gtmContainerId});
}
}
}
___SERVER_PERMISSIONS___
[
{
"instance": {
"key": {
"publicId": "read_request",
"versionId": "1"
},
"param": [
{
"key": "queryParametersAllowed",
"value": {
"type": 8,
"boolean": true
}
},
{
"key": "headersAllowed",
"value": {
"type": 8,
"boolean": true
}
},
{
"key": "pathAllowed",
"value": {
"type": 8,
"boolean": true
}
},
{
"key": "queryParameterAccess",
"value": {
"type": 1,
"string": "any"
}
},
{
"key": "requestAccess",
"value": {
"type": 1,
"string": "specific"
}
},
{
"key": "headerAccess",
"value": {
"type": 1,
"string": "any"
}
}
]
},
"clientAnnotations": {
"isEditedByUser": true
},
"isRequired": true
},
{
"instance": {
"key": {
"publicId": "return_response",
"versionId": "1"
},
"param": []
},
"isRequired": true
},
{
"instance": {
"key": {
"publicId": "access_response",
"versionId": "1"
},
"param": [
{
"key": "writeResponseAccess",
"value": {
"type": 1,
"string": "any"
}
},
{
"key": "writeHeaderAccess",
"value": {
"type": 1,
"string": "specific"
}
}
]
},
"clientAnnotations": {
"isEditedByUser": true
},
"isRequired": true
},
{
"instance": {
"key": {
"publicId": "send_http",
"versionId": "1"
},
"param": [
{
"key": "allowedUrls",
"value": {
"type": 1,
"string": "specific"
}
},
{
"key": "allowGoogleDomains",
"value": {
"type": 8,
"boolean": true
}
}
]
},
"clientAnnotations": {
"isEditedByUser": true
},
"isRequired": true
}
]
___TESTS___
scenarios: []
___NOTES___
Created on 19-8-2022 10:15:18