(PureBasic) Walmart - Get Inventory for an Item

Demonstrates how to get inventory for an item and parse the result.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkXml.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkAuthUtil.pb"
IncludeFile "CkJsonObject.pb"

Procedure ChilkatExample()

    ; ---------------------------------------------------------------------------------------------------------
    ; Note: This example is deprecated.  The Walmart API no longer uses the Signature method of authenticating.
    ; Walmart now uses OAuth2.  
    ; ---------------------------------------------------------------------------------------------------------

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

    ; Sends the following GET request:
    ; GET https://marketplace.walmartapis.com/v2/inventory?sku={SKU}

    sbUrl.i = CkStringBuilder::ckCreate()
    If sbUrl.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkStringBuilder::ckAppend(sbUrl,"https://marketplace.walmartapis.com/v2/inventory?sku={SKU}")
    numReplaced.i = CkStringBuilder::ckReplace(sbUrl,"{SKU}","HOPP~904~51041")

    requestMethod.s = "GET"

    ; First we need to generate a signature for our request.
    ; The signature needs to be re-generated for each new Walmart HTTP request.
    authUtil.i = CkAuthUtil::ckCreate()
    If authUtil.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    wmConsumerId.s = "WALMART_CONSUMER_ID"
    wmPrivateKey.s = "WALMART_PRIVATE_KEY"
    jsonStr.s = CkAuthUtil::ckWalmartSignature(authUtil,CkStringBuilder::ckGetAsString(sbUrl),wmConsumerId,wmPrivateKey,requestMethod)
    If CkAuthUtil::ckLastMethodSuccess(authUtil) <> 1
        Debug CkAuthUtil::ckLastErrorText(authUtil)
        CkStringBuilder::ckDispose(sbUrl)
        CkAuthUtil::ckDispose(authUtil)
        ProcedureReturn
    EndIf

    ; The JSON returned by WalmartSignature contains the values to be used in the following
    ; header fields: WM_SEC.AUTH_SIGNATURE, WM_SEC.TIMESTAMP, and WM_QOS.CORRELATION_ID
    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoad(json,jsonStr)

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

    CkHttp::ckSetRequestHeader(http,"WM_SVC.NAME","Walmart Marketplace")
    CkHttp::ckSetRequestHeader(http,"WM_QOS.CORRELATION_ID",CkJsonObject::ckStringOf(json,"correlation_id"))
    CkHttp::ckSetRequestHeader(http,"WM_SEC.TIMESTAMP",CkJsonObject::ckStringOf(json,"timestamp"))
    CkHttp::ckSetRequestHeader(http,"WM_SEC.AUTH_SIGNATURE",CkJsonObject::ckStringOf(json,"signature"))
    CkHttp::ckSetRequestHeader(http,"WM_CONSUMER.ID",wmConsumerId)
    CkHttp::setCkAccept(http, "application/xml")

    ; Note: Do not explicitly set the "Host" header.  Chilkat will set it automatically.

    xmlStr.s = CkHttp::ckQuickGetStr(http,CkStringBuilder::ckGetAsString(sbUrl))
    If CkHttp::ckLastMethodSuccess(http) <> 1
        Debug CkHttp::ckLastErrorText(http)
        CkStringBuilder::ckDispose(sbUrl)
        CkAuthUtil::ckDispose(authUtil)
        CkJsonObject::ckDispose(json)
        CkHttp::ckDispose(http)
        ProcedureReturn
    EndIf

    xml.i = CkXml::ckCreate()
    If xml.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::ckLoadXml(xml,xmlStr)

    ; A successful response should have a 200 response status
    If CkHttp::ckLastStatus(http) <> 200
        Debug CkXml::ckGetXml(xml)
        Debug "Response Status Code: " + Str(CkHttp::ckLastStatus(http))
        Debug "Failed."
        CkStringBuilder::ckDispose(sbUrl)
        CkAuthUtil::ckDispose(authUtil)
        CkJsonObject::ckDispose(json)
        CkHttp::ckDispose(http)
        CkXml::ckDispose(xml)
        ProcedureReturn
    EndIf

    ; A sample XML response is shown below..
    Debug CkXml::ckGetXml(xml)
    Debug "--"

    ; To get the quantity:
    quantity.i = CkXml::ckGetChildIntValue(xml,"quantity|amount")
    Debug "quantity = " + Str(quantity)

    ; ---------------------------------------
    ; Sample XML response
    ; ---------------------------------------

    ; <?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
    ; <inventory xmlns="http://walmart.com/">
    ;     <sku>HOPP~904~51041</sku>
    ;     <quantity>
    ;         <unit>EACH</unit>
    ;         <amount>234</amount>
    ;     </quantity>
    ;     <fulfillmentLagTime>5</fulfillmentLagTime>
    ; </inventory>


    CkStringBuilder::ckDispose(sbUrl)
    CkAuthUtil::ckDispose(authUtil)
    CkJsonObject::ckDispose(json)
    CkHttp::ckDispose(http)
    CkXml::ckDispose(xml)


    ProcedureReturn
EndProcedure