(PureBasic) Send GMail using REST API

See more GMail REST API Examples

Demonstrates how to send an email using the GMail REST API.

Chilkat PureBasic Module Download

Chilkat PureBasic Module

IncludeFile "CkHttpResponse.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkEmail.pb"

Procedure ChilkatExample()

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

    success.i

    ; Use the Chilkat Email API to create or load an email.
    email.i = CkEmail::ckCreate()
    If email.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; The From name/address don't need to be specified. 
    ; GMail will automatically use your Gmail address if the following 2 lines are omitted.
    CkEmail::setCkFromName(email, "My Name")
    CkEmail::setCkFromAddress(email, "my_account_name@gmail.com")

    CkEmail::ckAddTo(email,"John Smith","somebody@somewhere.com")
    ; To add more recipients, make additional calls to AddTo or AddCC, one per recipient...

    CkEmail::setCkSubject(email, "This is a test GMail email created using Chilkat.")
    CkEmail::setCkCharset(email, "utf-8")
    CkEmail::ckAddPlainTextAlternativeBody(email,"This is a test")

    ; Create an HTML email body with an embedded image.
    cid.s = CkEmail::ckAddRelatedFile(email,"qa_data/jpg/starfish.jpg")
    sbHtml.i = CkStringBuilder::ckCreate()
    If sbHtml.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkStringBuilder::ckAppend(sbHtml,"<html><body>This is a <b>test</b><br><img src=" + Chr(34) + "cid:STARFISH_CID" + Chr(34) + "/></body></html>")
    numReplacements.i = CkStringBuilder::ckReplace(sbHtml,"STARFISH_CID",cid)

    CkEmail::ckAddHtmlAlternativeBody(email,CkStringBuilder::ckGetAsString(sbHtml))

    ; OK.. we now have an HTML email with an embedded JPG image
    ; We'll need to get the full MIME of the email encoded to a base64url string.
    sbMime.i = CkStringBuilder::ckCreate()
    If sbMime.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkEmail::ckGetMimeSb(email,sbMime)
    CkStringBuilder::ckEncode(sbMime,"base64url","utf-8")

    ; The body of the HTTP request will be JSON..
    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckUpdateSb(json,"raw",sbMime)

    ; Send the email...
    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkHttp::setCkAuthToken(http, "GMAIL-ACCESS-TOKEN")

    url.s = "https://www.googleapis.com/gmail/v1/users/me/messages/send"
    resp.i = CkHttp::ckPostJson3(http,url,"application/json",json)
    If CkHttp::ckLastMethodSuccess(http) <> 1
        Debug CkHttp::ckLastErrorText(http)
        CkEmail::ckDispose(email)
        CkStringBuilder::ckDispose(sbHtml)
        CkStringBuilder::ckDispose(sbMime)
        CkJsonObject::ckDispose(json)
        CkHttp::ckDispose(http)
        ProcedureReturn
    EndIf

    ; A status code of 200 indicates success.
    Debug "Response status code: " + Str(CkHttpResponse::ckStatusCode(resp))
    Debug "Response body:"
    Debug CkHttpResponse::ckBodyStr(resp)
    CkHttpResponse::ckDispose(resp)

    ; The response body contains JSON.
    ; Use the online tool at Generate JSON Parsing Code
    ; to generate JSON parsing code.

    ; A sample successful JSON response:

    ; {
    ;  "id": "166f0d4ac39e50bf",
    ;  "threadId": "166f0d4ac39e50bf",
    ;  "labelIds": [
    ;   "SENT"
    ;  ]
    ; }


    CkEmail::ckDispose(email)
    CkStringBuilder::ckDispose(sbHtml)
    CkStringBuilder::ckDispose(sbMime)
    CkJsonObject::ckDispose(json)
    CkHttp::ckDispose(http)


    ProcedureReturn
EndProcedure