I am running Invoke-Webrequest to upload a file to Nexus server the first time when I run it, works fine but when I re-run it, fails because the file already exists and Nexus is set to not allowing overwriting existing files. What I need is that when I run Invoke-Webrequest when the file I'm trying to upload already exists, it just simply returns 400 bad request. How can I get more detailed error message so that I know what the problem is with the request?
try {
// invoke-webrequest
}
catch {
throw $_.Exception.Response
}
i guess this will help you quite a lot, i find it in this Answer:
function ParseErrorForResponseBody($Error) {
if ($PSVersionTable.PSVersion.Major -lt 6) {
if ($Error.Exception.Response) {
$Reader = New-Object System.IO.StreamReader($Error.Exception.Response.GetResponseStream())
$Reader.BaseStream.Position = 0
$Reader.DiscardBufferedData()
$ResponseBody = $Reader.ReadToEnd()
if ($ResponseBody.StartsWith('{')) {
$ResponseBody = $ResponseBody | ConvertFrom-Json
}
return $ResponseBody
}
}
else {
return $Error.ErrorDetails.Message
}
}
try {
$result = Invoke-WebRequest ...
}
catch {
ParseErrorForResponseBody($_)
}
Related
I've tried invoke-restmethod, new-object and many other methods to achieve what I'm trying to do. Here are the latest two iterations:
$req = Invoke-WebRequest -uri $scripturl -OutFile "$($scriptpath)\fls.core.ps1"
Write-Host "StatusCode:" $req.StatusCode
$req = Invoke-WebRequest -uri $scripturl -OutFile "$($scriptpath)\fls.core.ps1" | Select-Object -Expand StatusCode
Write-Host "StatusCode:" $req
Basically I'm attempting to download another PowerShell script and execute it. So obviously it needs to be synchronous. I also need the status so I can determine if it updated or not.
Here is pseudo code for what I'm trying to accomplish:
try {
download file
} catch {
output error
if (local copy exists) {
log warning that local copy is being used
} else {
log error could not download and no local copy available
exit script
}
}
run script (only after downloading new one if available)
Here is my current code in full:
$param1=$args[0]
if ($param1 -eq "-d" -or $param1 -eq "-D") {
$isDev = $true
}
#todo: Move to config file
$logpath = "c:\company\logs\loginscript"
$scriptpath = "c:\company\scripts\"
$scripturl = "http://downloads.company.com/fls.core.ps1"
$logfile="$(Get-Date -Format "yyyy-MM-dd hhmmss").log"
Function log($message) {
Write-Output "[$(Get-Date -Format "yyyy-MM-dd hhmmss")] $message" | Out-file "$($logpath)\$($logfile)" -append
if ($isDev) { Write-Host "[$(Get-Date -Format "yyyy-MM-dd hhmmss")] $message" }
}
Function createFolder($path) {
if (-!(Test-Path $path)) { New-Item -Type Directory -Path $path }
}
function updateScripts() {
try {
$req = Invoke-WebRequest -uri $scripturl -OutFile "$($scriptpath)\fls.core.ps1"
Write-Host "StatusCode:" $req.StatusCode
} catch {
Write-Host "StatusCode:" $req.StatusCode
if ($req.StatusCode -eq 404) {
log "WARNING: Script not found at $scripturl"
} else {
log "ERROR: Script download error: $req.StatusCode"
}
if (Test-Path "$($scriptpath)\fls.core.ps1") {
log "WARNING: Using local script"
} else {
log "ERROR: Unable to update script and no local script found. Exiting."
exit
}
}
}
#----------------------------------------------#
#---- MAIN CODE BLOCK -------------------------#
#----------------------------------------------#
createFolder $logpath
createFolder $scriptpath
#update scripts
updateScripts
#execute core loginscript
& $scriptpath/fls.core.ps1
$req.StatusCode appears to be null.
Invoke-WebRequest reports errors as statement-terminating errors, which means that no assignment to variable $req (in statement $req = Invoke-WebRequest ...) takes place in case an error occurs.
Instead, unfortunately, if an error occurs, the response object[1] must be gleaned from the [ErrorRecord] instance representing the error, which is available via $Error[0] after the fact, or via $_ in the catch block of a try { ... } catch { ... } statement (adapted from this answer):
try {
Invoke-WebRequest -Uri $scripturl -OutFile "$scriptpath\fls.core.ps1"
} catch [Microsoft.PowerShell.Commands.HttpResponseException] {
# Get the status code...
$statuscode = $_.Exception.Response.StatusCode
# ... and work with it.
# if ($statusCode -eq 404) { ...
} catch {
# Unexpected error, re-throw
throw
}
Strictly speaking, $_.Exception.Response.StatusCode returns a value from an enumeration type, System.Net.HttpStatusCode, not an [int] value, but you can use it like an integer. To return an integer to begin with, append .Value__ or cast to [int].
Note that Invoke-WebRequest is always synchronous; if you download a file (successfully), the call won't return until the download is completed.
[1] As the linked answer explains, the response object contained in the error record is of a different type than the one that Invoke-WebRequest returns in case of success (which requires -PassThru if -OutFile is also specified): The error record's .Exception.Response property contains a System.Net.Http.HttpResponseMessage instance, whereas Invoke-WebRequest returns an instance (derived from) Microsoft.PowerShell.Commands.WebResponseObject, which incorporates an instance of the former type, in its .BaseResponse property.
New to the forum and new to Powershell. Hopefully in the right place. I'm trying to authenticate a web url and use the -UseDefaultCredentials within Powershell. I found this code on Stackoverflow - 404 Response:
$URI='http://www.example.com'
try {
$HttpWebResponse = $null;
$HttpWebRequest = [System.Net.HttpWebRequest]::Create("$URI");
$HttpWebResponse = $HttpWebRequest.GetResponse();
if ($HttpWebResponse) {
Write-Host -Object $HttpWebResponse.StatusCode.value__;
Write-Host -Object $HttpWebResponse.GetResponseHeader("X-Detailed-Error");
}
}
catch {
$ErrorMessage = $Error[0].Exception.ErrorRecord.Exception.Message;
$Matched = ($ErrorMessage -match '[0-9]{3}')
if ($Matched) {
Write-Host -Object ('HTTP status code was {0} ({1})' -f $HttpStatusCode, $matches.0);
}
else {
Write-Host -Object $ErrorMessage;
}
$HttpWebResponse = $Error[0].Exception.InnerException.Response;
$HttpWebResponse.GetResponseHeader("X-Detailed-Error");
}
The code above is doing what I want with returning the HTTP code. However, the question is, where do I insert the -UseDefaultCredentials within this block of code? I've tried adding it in to within and outside the try statement but get the error message:
Error Message
I originally used this piece of code:
Invoke-WebRequest -Uri http://www.example.com -UseDefaultCredentials
but my problem I experienced was then trying to write out the HTTP return code compared to the code that is listed above.
Any help would be appreciated.
I am trying to write a PowerShell script that will restart an application pool in IIS if a 503 response code is received.
So far I have managed to retrieve the response code for every crm application under the default website in IIS. However I am unsure how I would go about finding the application pool name. I've tried the below, but it returns the same application pool for each site. Can anyone help?
$getSite = (Get-WebApplication -Site 'Default Web Site')
$SiteURL = ForEach ($site in $getSite.path) {("http://localhost")+$site}
ForEach ($crm in $SiteURL){
$req = [system.Net.WebRequest]::Create($crm)
try {
$res = $req.GetResponse()
} catch [System.Net.WebException] {
$res = $_.Exception.Response
}
$ApplicationPool = ForEach ($app in $getSite.applicationpool) {$app}
if([int]$res.StatusCode -eq 503) {write-host ($crm + ' ' + [int]$res.StatusCode) + $app}
}
I think you need to access $_.Exception.InnerException for the the Response property.
Your $ApplicationPool assignment doesn't make much sense, as you would only need one applicationPool name per $crm app you test:
foreach($App in #(Get-WebApplication -Site 'Default Web Site')){
# Uri for the application
$TestUri = 'http://localhost{0}' -f $App.path
# Create WebRequest
$Request = [system.Net.WebRequest]::Create($TestUri)
try {
# Get the response
$Response = $Request.GetResponse()
} catch [System.Net.WebException] {
# If it fails, get Response from the Exception
$Response = $_.Exception.InnerException.Response
}
# The numerical value of the StatusCode value is the HTTP status code, ie. 503
if(503 -eq ($Response.StatusCode -as [int])){
# Restart the app pool
Restart-WebAppPool -Name $App.applicationPool
}
}
I have to call an API exposed by TeamCity that will tell me whether a user exists. The API url is this: http://myteamcityserver.com:8080/httpAuth/app/rest/users/monkey
When called from the browser (or fiddler), I get the following back:
Error has occurred during request processing (Not Found).
Error: jetbrains.buildServer.server.rest.errors.NotFoundException: No user can be found by username 'monkey'.
Could not find the entity requested. Check the reference is correct and the user has permissions to access the entity.
I have to call the API using powershell. When I do it I get an exception and I don't see the text above. This is the powershell I use:
try{
$client = New-Object System.Net.WebClient
$client.Credentials = New-Object System.Net.NetworkCredential $TeamCityAgentUserName, $TeamCityAgentPassword
$teamCityUser = $client.DownloadString($url)
return $teamCityUser
}
catch
{
$exceptionDetails = $_.Exception
Write-Host "$exceptionDetails" -foregroundcolor "red"
}
The exception:
System.Management.Automation.MethodInvocationException: Exception calling "DownloadString" with "1" argument(s): "The remote server returned an error: (404) Not Found." ---> System.Net.WebException: The remote server returned an error: (404) Not Found.
at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request)
at System.Net.WebClient.DownloadString(Uri address)
at CallSite.Target(Closure , CallSite , Object , Object )
--- End of inner exception stack trace ---
at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
at System.Management.Automation.Interpreter.ActionCallInstruction`2.Run(InterpretedFrame frame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
I need to be able to check that the page is returned contains the text described above. This way I know whether I should create a new user automatically or not.
I could just check for 404, but my fear is that if the API is changed and the call really returns a 404, then I would be none the wiser.
Change your catch clause to catch the more specific WebException, then you can use the Response property on it to get the status code:
{
#...
}
catch [System.Net.WebException]
{
$statusCode = [int]$_.Exception.Response.StatusCode
$html = $_.Exception.Response.StatusDescription
}
BrokenGlass gave the answer, but this might help:
try
{
$URI='http://8bit-museum.de/notfound.htm'
$HTTP_Request = [System.Net.WebRequest]::Create($URI)
"check: $URI"
$HTTP_Response = $HTTP_Request.GetResponse()
# We then get the HTTP code as an integer.
$HTTP_Status = [int]$HTTP_Response.StatusCode
}
catch [System.Net.WebException]
{
$statusCode = [int]$_.Exception.Response.StatusCode
$statusCode
$html = $_.Exception.Response.StatusDescription
$html
}
$HTTP_Response.Close()
Response:
check: http://8bit-museum.de/notfound.htm
404
Not Found
another approach:
$URI='http://8bit-museum.de/notfound.htm'
try {
$HttpWebResponse = $null;
$HttpWebRequest = [System.Net.HttpWebRequest]::Create("$URI");
$HttpWebResponse = $HttpWebRequest.GetResponse();
if ($HttpWebResponse) {
Write-Host -Object $HttpWebResponse.StatusCode.value__;
Write-Host -Object $HttpWebResponse.GetResponseHeader("X-Detailed-Error");
}
}
catch {
$ErrorMessage = $Error[0].Exception.ErrorRecord.Exception.Message;
$Matched = ($ErrorMessage -match '[0-9]{3}')
if ($Matched) {
Write-Host -Object ('HTTP status code was {0} ({1})' -f $HttpStatusCode, $matches.0);
}
else {
Write-Host -Object $ErrorMessage;
}
$HttpWebResponse = $Error[0].Exception.InnerException.Response;
$HttpWebResponse.GetResponseHeader("X-Detailed-Error");
}
if i understand the question then $ErrorMessage = $Error[0].Exception.ErrorRecord.Exception.Message contains the errormessage you are looking for.
(source: Error Handling in System.Net.HttpWebRequest::GetResponse() )
Another simple example, hope this helps:
BEGIN
{
# set an object to store results
$queries = New-Object System.Collections.ArrayList
Function Test-Website($Site)
{
try
{
# check the Site param passed in
$request = Invoke-WebRequest -Uri $Site
}
catch [System.Net.WebException] # web exception
{
# if a 404
if([int]$_.Exception.Response.StatusCode -eq 404)
{
$request = [PSCustomObject]#{Site=$site;ReturnCode=[int]$_.Exception.Response.StatusCode}
}
else
{
# set a variable to set a value available to automate with later
$request = [PSCustomObject]#{Site=$site;ReturnCode='another_thing'}
}
}
catch
{
# available to automate with later
$request = [PSCustomObject]#{Site=$site;ReturnCode='request_failure'}
}
# if successful as an invocation and has
# a StatusCode property
if($request.StatusCode)
{
$siteURI = $Site
$response = $request.StatusCode
}
else
{
$response = $request.ReturnCode
}
# return the data
return [PSCustomObject]#{Site=$Site;Response=$response}
}
}
PROCESS
{
# test all the things
$nullTest = Test-Website -Site 'http://www.Idontexist.meh'
$nonNullTest = Test-Website -Site 'https://www.stackoverflow.com'
$404Test = Test-Website -Site 'https://www.stackoverflow.com/thispagedoesnotexist'
# add all the things to results
$queries.Add($nullTest) | Out-Null
$queries.Add($nonNullTest) | Out-Null
$queries.Add($404Test) | Out-Null
# show the info
$queries | Format-Table
}
END{}
Output:
Site Response
---- --------
http://www.Idontexist.meh another_thing
https://www.stackoverflow.com 200
https://www.stackoverflow.com/thispagedoesnotexist 404
You could try using the Internet Explorer COM object instead. It allows you to check the browser return codes and navigate the HTML object model.
Note: I've found that you need to run this from an elevated PowerShell prompt in order to maintain the COM object definition.
$url = "http://myteamcityserver.com:8080/httpAuth/app/rest/users/monkey"
$ie = New-Object -ComObject InternetExplorer.Application
Add this to See the browser
$ie.visibility = $true
Navigate to the site
$ie.navigate($url)
This will pause the script until the page fully loads
do { start-sleep -Milliseconds 250 } until ($ie.ReadyState -eq 4)
Then verify your URL to make sure it's not an error page
if ($ie.document.url -ne $url) {
Write-Host "Site Failed to Load" -ForegroundColor "RED"
} else {
[Retrieve and Return Data]
}
You can navigate HTML Object model via $ie.document. Using Get-Member and HTML methods such as GetElementsByTagName() or GetElementById().
If credentials are an issue, build this into a function then use Invoke-Command with the -Credentials parameter to define your logon information.
In Powershell v3.0 I would like to return the response code from an HTTP GET, such as 200 OK or 500 Internal Server Error. (This is for a hack-deploy to do a quick warmup of a deployed site and see if it works, a sort of a mini acceptance test. The status code is truly all I want.)
Against my wishes, HttpWebRequest.GetResponse throws an error when it receives a 500 Internal Server Error. This is annoying because it isn't really an error to me in my use case. Anyway, I figured I could catch the exception and still peel out the underlying response code, but I'm having trouble with that.
Here's some almost-working code:
function WebResponseStatusCode (
[Parameter(Mandatory=$true)][string] $url
) {
$req = [system.Net.HttpWebRequest]::Create($url)
try {
$res = $req.GetResponse();
$statuscode = $res.statuscode;
}
catch [System.Net.WebException] {
#the outer error is a System.Management.Automation.ErrorRecord
Write-Host "error!"
return = $_.Response.statuscode; #nope
}
finally {
if (!($res -eq $null)) {
$res.Close();
}
}
return $statuscode;
}
The problem is of course that $_ has no Response property. Neither does $_.InnerException, even when cast:
return [System.Net.WebException]($_.InnerException)
I've played around with $_ | Get-Member and exploring all its properties. I thought $_.TargetObject had some promise but it doesn't appear to.
(Update) I also think I tried variations on $_.Exception.Response though may have gotten it wrong.
Getting just a response code seems like such a simple thing to do.
Here's an example, though it does a couple more things to allow you to test redirections as well as expected exceptions.
function GetWebSiteStatusCode {
param (
[string] $testUri,
$maximumRedirection = 5
)
$request = $null
try {
$request = Invoke-WebRequest -Uri $testUri -MaximumRedirection $maximumRedirection -ErrorAction SilentlyContinue
}
catch [System.Net.WebException] {
$request = $_.Exception.Response
}
catch {
Write-Error $_.Exception
return $null
}
$request.StatusCode
}
GetWebSiteStatusCode -testUri "https://www.google.com/"
GetWebSiteStatusCode -testUri "https://www.google.com/foobar"
GetWebSiteStatusCode -testUri "http://google.com/" -maximumRedirection 0
GetWebSiteStatusCode -testUri "https://accounts.google.com" -maximumRedirection 0
GetWebSiteStatusCode -testUri "https://www.googleapis.com/coordinate/v1/teams/1/custom_fields?fields=1111&key="
GetWebSiteStatusCode -testUri "https://www.googleapis.com/shopping/search/v1/test/products/sasdf/asdf/asdf?key="
#Next test would be for an expected 500 page.
#GetWebSiteStatusCode -testUri "https://www.somesite.com/someurlthatreturns500"