How to send an HTTP POST request to a server from Excel using VBA?

How to send an HTTP POST request to a server from Excel using VBA?

You can send an HTTP POST request to a server from Excel using VBA by leveraging the MSXML2.XMLHTTP object. Here's a basic example to illustrate how to do it:

Sub SendHttpPostRequest() Dim url As String Dim httpRequest As Object ' Specify the URL of the server to send the request to url = "https://example.com/api/endpoint" ' Create a new HTTP request object Set httpRequest = CreateObject("MSXML2.XMLHTTP") ' Prepare the request httpRequest.Open "POST", url, False httpRequest.setRequestHeader "Content-Type", "application/json" ' Construct the request body (JSON payload) Dim requestBody As String requestBody = "{""key1"": ""value1"", ""key2"": ""value2""}" ' Example JSON payload ' Send the request with the constructed payload httpRequest.send requestBody ' Check if the request was successful (status code 200) If httpRequest.Status = 200 Then MsgBox "Request successful. Response: " & httpRequest.responseText Else MsgBox "Request failed. Status code: " & httpRequest.Status & " - " & httpRequest.statusText End If End Sub

In this example:

  • Replace "https://example.com/api/endpoint" with the URL of the server and endpoint you want to send the POST request to.
  • Adjust the requestBody variable to match the JSON payload you want to send.
  • After sending the request, you can check the status code and response text to handle the response accordingly.

Make sure you have proper error handling in your code to deal with potential issues like network errors or server-side errors. Additionally, be aware of any security considerations when sending requests to external servers.

Examples

  1. How to send HTTP POST request from Excel VBA

    Description: This query seeks a general guide on sending HTTP POST requests from Excel using VBA.

    ' Reference required: Microsoft WinHTTP Services version 5.1 Sub SendHttpPostRequest() Dim httpRequest As Object Set httpRequest = CreateObject("WinHttp.WinHttpRequest.5.1") ' Define the URL Dim url As String url = "https://your-api-endpoint.com" ' Open the connection httpRequest.Open "POST", url, False ' Set request headers httpRequest.setRequestHeader "Content-Type", "application/json" ' Define the request body (if needed) Dim requestBody As String requestBody = "{""key"":""value""}" ' Send the request httpRequest.send requestBody ' Get the response MsgBox httpRequest.responseText End Sub

  2. Excel VBA HTTP POST request with JSON payload

    Description: This query focuses on sending an HTTP POST request with a JSON payload from Excel VBA.

    ' Reference required: Microsoft WinHTTP Services version 5.1 Sub SendHttpPostRequestWithJsonPayload() Dim httpRequest As Object Set httpRequest = CreateObject("WinHttp.WinHttpRequest.5.1") ' Define the URL Dim url As String url = "https://your-api-endpoint.com" ' Open the connection httpRequest.Open "POST", url, False ' Set request headers httpRequest.setRequestHeader "Content-Type", "application/json" ' Define the JSON payload Dim jsonPayload As String jsonPayload = "{""key"":""value""}" ' Send the request httpRequest.send jsonPayload ' Get the response MsgBox httpRequest.responseText End Sub

  3. Excel VBA HTTP POST request with form data

    Description: This query addresses sending an HTTP POST request with form data from Excel VBA.

    ' Reference required: Microsoft WinHTTP Services version 5.1 Sub SendHttpPostRequestWithFormData() Dim httpRequest As Object Set httpRequest = CreateObject("WinHttp.WinHttpRequest.5.1") ' Define the URL Dim url As String url = "https://your-api-endpoint.com" ' Open the connection httpRequest.Open "POST", url, False ' Set request headers httpRequest.setRequestHeader "Content-Type", "application/x-www-form-urlencoded" ' Define the form data Dim formData As String formData = "key1=value1&key2=value2" ' Send the request httpRequest.send formData ' Get the response MsgBox httpRequest.responseText End Sub

  4. Excel VBA HTTP POST request with authentication

    Description: This query aims to send an HTTP POST request with authentication from Excel VBA.

    ' Reference required: Microsoft WinHTTP Services version 5.1 Sub SendHttpPostRequestWithAuthentication() Dim httpRequest As Object Set httpRequest = CreateObject("WinHttp.WinHttpRequest.5.1") ' Define the URL Dim url As String url = "https://your-api-endpoint.com" ' Open the connection httpRequest.Open "POST", url, False ' Set basic authentication httpRequest.SetCredentials "username", "password", HTTPREQUEST_SETCREDENTIALS_FOR_SERVER ' Set request headers httpRequest.setRequestHeader "Content-Type", "application/json" ' Define the JSON payload Dim jsonPayload As String jsonPayload = "{""key"":""value""}" ' Send the request httpRequest.send jsonPayload ' Get the response MsgBox httpRequest.responseText End Sub

  5. Excel VBA HTTP POST request with headers

    Description: This query focuses on sending an HTTP POST request with custom headers from Excel VBA.

    ' Reference required: Microsoft WinHTTP Services version 5.1 Sub SendHttpPostRequestWithCustomHeaders() Dim httpRequest As Object Set httpRequest = CreateObject("WinHttp.WinHttpRequest.5.1") ' Define the URL Dim url As String url = "https://your-api-endpoint.com" ' Open the connection httpRequest.Open "POST", url, False ' Set custom headers httpRequest.setRequestHeader "Custom-Header", "header-value" ' Define the request body (if needed) Dim requestBody As String requestBody = "{""key"":""value""}" ' Send the request httpRequest.send requestBody ' Get the response MsgBox httpRequest.responseText End Sub

  6. Excel VBA HTTP POST request handling response

    Description: This query concerns handling the response of an HTTP POST request in Excel VBA.

    ' Reference required: Microsoft WinHTTP Services version 5.1 Sub SendHttpPostRequestAndHandleResponse() Dim httpRequest As Object Set httpRequest = CreateObject("WinHttp.WinHttpRequest.5.1") ' Define the URL Dim url As String url = "https://your-api-endpoint.com" ' Open the connection httpRequest.Open "POST", url, False ' Set request headers httpRequest.setRequestHeader "Content-Type", "application/json" ' Define the JSON payload Dim jsonPayload As String jsonPayload = "{""key"":""value""}" ' Send the request httpRequest.send jsonPayload ' Check if request was successful If httpRequest.Status = 200 Then ' Successful request MsgBox "Request successful!" ' Handle response MsgBox httpRequest.responseText Else ' Request failed MsgBox "Request failed with status code: " & httpRequest.Status End If End Sub

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