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Google Contacts - Retrieve as JSON
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Demonstrates how to retrieve Google Contacts as JSON.Chilkat Go Downloads
success := false
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// --------------------------------------------------------------------------------------------------------
// Note: The code for setting up the Chilkat REST object and making the initial connection can be done once.
// Once connected, the REST object may be re-used for many REST API calls.
// (It's a good idea to put the connection setup code in a separate function/subroutine.)
// --------------------------------------------------------------------------------------------------------
// It is assumed we previously obtained an OAuth2 access token.
// This example loads the JSON access token file
// saved by this example: Get Google Contacts OAuth2 Access Token
jsonToken := chilkat.NewJsonObject()
success = jsonToken.LoadFile("qa_data/tokens/googleContacts.json")
if success != true {
fmt.Println("Failed to load googleContacts.json")
jsonToken.DisposeJsonObject()
return
}
gAuth := chilkat.NewAuthGoogle()
gAuth.SetAccessToken(jsonToken.StringOf("access_token"))
rest := chilkat.NewRest()
// Connect using TLS.
bAutoReconnect := true
success = rest.Connect("www.google.com",443,true,bAutoReconnect)
// Provide the authentication credentials (i.e. the access token)
rest.SetAuthGoogle(gAuth)
// ----------------------------------------------
// OK, the REST connection setup is completed..
// ----------------------------------------------
// To retrieve the contacts, we need to send the following:
// GET /m8/feeds/contacts/default/full
// GData-Version: 3.0
// To get the contacts data in JSON format, set the "alt" query parameter to "json"
rest.AddQueryParam("alt","json")
rest.AddHeader("GData-Version","3.0")
sbResponseBody := chilkat.NewStringBuilder()
success = rest.FullRequestNoBodySb("GET","/m8/feeds/contacts/default/full",sbResponseBody)
if success != true {
fmt.Println(rest.LastErrorText())
jsonToken.DisposeJsonObject()
gAuth.DisposeAuthGoogle()
rest.DisposeRest()
sbResponseBody.DisposeStringBuilder()
return
}
// A successful response will have a status code equal to 200.
if rest.ResponseStatusCode() != 200 {
fmt.Println("response status code = ", rest.ResponseStatusCode())
fmt.Println("response status text = ", rest.ResponseStatusText())
fmt.Println("response header: ", rest.ResponseHeader())
fmt.Println("response body: ", *sbResponseBody.GetAsString())
jsonToken.DisposeJsonObject()
gAuth.DisposeAuthGoogle()
rest.DisposeRest()
sbResponseBody.DisposeStringBuilder()
return
}
// If the 200 response was received, then the contacts JSON is contained
// in the response body.
json := chilkat.NewJsonObject()
json.LoadSb(sbResponseBody)
json.SetEmitCompact(false)
// Save the pretty-printed JSON response to a file.
sbResponseBody.Clear()
json.EmitSb(sbResponseBody)
sbResponseBody.WriteFile("qa_output/google_contacts.json","utf-8",false)
// Parse the Google Contacts JSON, and iterate over the contacts..
totalResults := json.IntOf("feed.openSearch$totalResults.$t")
startIndex := json.IntOf("feed.openSearch$startIndex.$t")
itemsPerPage := json.IntOf("feed.openSearch$itemsPerPage.$t")
fmt.Println("totalResults = ", totalResults)
fmt.Println("startIndex = ", startIndex)
fmt.Println("itemsPerPage = ", itemsPerPage)
numEntries := json.SizeOfArray("feed.entry")
i := 0
for i < numEntries {
json.SetI(i)
fmt.Println(i + 1, " ----")
fmt.Println("title: ", *json.StringOf("feed.entry[i].title.$t"))
fullName := json.StringOf("feed.entry[i].gd$name.gd$fullName.$t")
if json.LastMethodSuccess() == true {
fmt.Println("fullName: ", *fullName)
}
// There can be multiple email addresses, so it's stored as a JSON array..
numEmailAddresses := json.SizeOfArray("feed.entry[i].gd$email")
j := 0
for j < numEmailAddresses {
emailAddress := json.StringOf("feed.entry[i].gd$email[j].address")
if json.LastMethodSuccess() == true {
fmt.Println("email address: ", *emailAddress)
}
j = j + 1
}
i = i + 1
}
// A sample Google Contacts JSON response:
// {
// "version": "1.0",
// "encoding": "UTF-8",
// "feed": {
// "xmlns": "http://www.w3.org/2005/Atom",
// "xmlns$openSearch": "http://a9.com/-/spec/opensearch/1.1/",
// "xmlns$gContact": "http://schemas.google.com/contact/2008",
// "xmlns$batch": "http://schemas.google.com/gdata/batch",
// "xmlns$gd": "http://schemas.google.com/g/2005",
// "gd$etag": "\"QHw5eTVSLyt7I2A9XRFaE0kNTwI.\"",
// "id": {
// "$t": "chilkat.support@gmail.com"
// },
// "updated": {
// "$t": "2016-11-17T01:57:41.221Z"
// },
// "category": [
// {
// "scheme": "http://schemas.google.com/g/2005#kind",
// "term": "http://schemas.google.com/contact/2008#contact"
// }
// ],
// "title": {
// "$t": "Chilkat Support's Contacts"
// },
// "link": [
// {
// "rel": "alternate",
// "type": "text/html",
// "href": "https://www.googleapis.com/"
// },
// {
// "rel": "http://schemas.google.com/g/2005#feed",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full"
// },
// {
// "rel": "http://schemas.google.com/g/2005#post",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full"
// },
// {
// "rel": "http://schemas.google.com/g/2005#batch",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full/batch"
// },
// {
// "rel": "self",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full?max-results=25&alt=json"
// },
// {
// "rel": "next",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full?max-results=25&alt=json&start-index=26"
// }
// ],
// "author": [
// {
// "name": {
// "$t": "Chilkat Support"
// },
// "email": {
// "$t": "chilkat.support@gmail.com"
// }
// }
// ],
// "generator": {
// "version": "1.0",
// "uri": "http://www.google.com/m8/feeds",
// "$t": "Contacts"
// },
// "openSearch$totalResults": {
// "$t": "350"
// },
// "openSearch$startIndex": {
// "$t": "1"
// },
// "openSearch$itemsPerPage": {
// "$t": "25"
// },
// "entry": [
// {
// "id": {
// "$t": "http://www.google.com/m8/feeds/contacts/chilkat.support%40gmail.com/base/0"
// },
// "gd$etag": "\"SX8zcTVSLyt7I2A9WxBXFU4MQwI.\"",
// "updated": {
// "$t": "2010-01-26T20:07:48.189Z"
// },
// "app$edited": {
// "xmlns$app": "http://www.w3.org/2007/app",
// "$t": "2010-01-26T20:07:48.189Z"
// },
// "category": [
// {
// "scheme": "http://schemas.google.com/g/2005#kind",
// "term": "http://schemas.google.com/contact/2008#contact"
// }
// ],
// "title": {
// "$t": "Joe Sample"
// },
// "link": [
// {
// "rel": "http://schemas.google.com/contacts/2008/rel#photo",
// "type": "image/*",
// "href": "https://www.googleapis.com/m8/feeds/photos/media/chilkat.support%40gmail.com/0"
// },
// {
// "rel": "self",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full/0"
// },
// {
// "rel": "edit",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full/0"
// }
// ],
// "gd$name": {
// "gd$fullName": {
// "$t": "Joe Sample"
// },
// "gd$givenName": {
// "$t": "Joe"
// },
// "gd$familyName": {
// "$t": "Sample"
// }
// },
// "gd$email": [
// {
// "address": "somebody@gmail.com",
// "primary": "true",
// "rel": "http://schemas.google.com/g/2005#other"
// }
// ]
// },
// ... more entries ...
//
jsonToken.DisposeJsonObject()
gAuth.DisposeAuthGoogle()
rest.DisposeRest()
sbResponseBody.DisposeStringBuilder()
json.DisposeJsonObject()