A lot of people have the same error for many different reasons, so, after trying a composer update, I've tried to investigate it starting from the browser and reconstructing step by step what is happening. It's really hard for me and I would really appreciate help from a PHP Developer!
From Chrome Developer Tools I could find the Ajax request in the background and the called url on the server
By playing with the url I realized that changing the action name returned a different error code, which let me understand that the current call is just a generic API in the middle between the browser and whatever is "apierror-visualeditor-docserver-http"
The Ajax call
{mysite}
/ api.php
? action=visualeditor
& paction=parse
&page=Cosa_c%27%C3%A8_da_fare%3F
Example
https://www.tematichedigenere.com/api.php?action=visualeditor&paction=parse&page=Cosa_c%27%C3%A8_da_fare%3F
The response from the Ajax call
The serverside call to rest api
Then I can see from the Apache server's log that the api page contacts the following url (returning 500)
GET
//rest.php/
{mywebsiteurl}
/v3/page/html/
Cosa_c%27%C3%A8_da_fare%3F/27246
?redirect=false
&stash=true
example
"GET //rest.php/www.tematichedigenere.com/v3/page/html/Cosa_c%27%C3%A8_da_fare%3F/27246?redirect=false&stash=true HTTP/1.0" 500 5621 "-" "VisualEditor-MediaWiki/1.38.2"
Another example of log (returning 404)
{an IP} - -
[04/Dec/2022:14:16:12 +0000]
"POST
/rest.php/
{mywebsiteurl}/v3
/transform/html/to/wikitext
/Riflessioni_sulla_sessualizz._femm._collegate_-_bozza%2Fprova
HTTP/1.0"
404
467
"-"
"VisualEditor-MediaWiki/1.38.2 X-Middleton/1"
Maybe the initial double / is wrong?
Anyway if I call the uri directly from my browser https://tematichedigenere.com/rest.php/www.tematichedigenere.com/v3/page/html/Cosa_c%27%C3%A8_da_fare%3F/27246?redirect=false&stash=true
The server does a antirobot check but I'm not sure that was the problem.
I've realized that the 500 error code hides a more complex real error which is returned by accessing directly the url from the log.
As you say, the visualeditor API is mostly just a proxy to the Parsoid API. The double / is wrong (check your $wgVirtualRestConfig settings maybe), I don't think it actually matters though. The error sounds like you are using incompatible library versions - make sure MediaWiki core and the VisualEditor extension are for the same release, and that the parsoid Composer library is up to date.
Update from OP:
the issue was solved. I simply had to delete the folder /vendor/wikimedia/parsoid and copy it from the fresh install. I couldn't see there were disalignment because of a problem in the compare tool. I got a lot of help in the IRC channel (not in Phabricator and not in Mediawiki forums, it seems IRC is really helpful for MW products).
I have a Blazor Webassembly project with a controller method as follows:
[HttpGet]
public async Task<List<string>> GetStatesForProfile()
{
IConfigurationSection statesSection = configuration.GetSection("SiteSettings:States");
var sections = statesSection.GetChildren();
var states = statesSection.GetChildren().Select(s => s.Key).ToList<string>();
return states;
}
The razor page calls this method:
private async Task<bool> GetStatesModel()
{
try
{
States = await http.GetJsonAsync<List<string>>("api/account/getstatesforprofile");
...
}
catch (Exception ex)
{
Console.WriteLine($"Exception: {ex.Message}, Inner: {ex.InnerException.Message}");
}
I get this Exception:
Exception: '<' is an invalid start of a value.
I read these values from appsettings.json file, And there is no '<' in values.
{
"SiteSettings": {
"States": {
"New York": ["NYC"],
"California": ["Los Angeles", "San Francisco"]
}
}
Also I put a breakpoint in the controller method and it doesn't hit.
What is this error? Is it from parsing json? and how to resolve this?
I had a very similar problem.
In the end it turned out that my browser had cached the HTML error page (I guess I had some problems with the code when I first tried it). And no matter how I tried fixing the code I still only got the error from cache. Clearing my cache also cleared the problem.
It happens when you're trying to access an API that doesn't exist. You have to check your API project connectionstring under AppSettings and make sure it's correct and running. If it's a Blazor project, you can set it as your default project, execute and see if you get a json response.
Most probably the response you are receiving is html instead of actual JSON format for the endpoint you are requesting. Please check that.
An as HTML usually starts with <html> tag, the JSON validator fails on the very first character.
You should also clear any cache, that might be interfering with the returned data. (this has helped people resolve this same issue)
I know this is an old question, but it's one of the top results when Googling the error.
I've just spent more time than I care to admit to tracking down this error. I had a straightforward Blazor hosted app, basically unchanged from the template. It worked just fine when run locally, but when published to my web host API calls failed. I finally figured out that the problem was that I was running the publish from the Client project. When I changed to the Server project it worked properly.
Hopefully my long frustration and slight stupidity will save someone else making a similar mistake.
Seems like your api is not not accessible and its returning error HTML page by default.
You can try below solution:-
I think you are using httpclient to get data to blazor application.
If you have separate projects in solution for blazor and web api,
currently your startup application may set to run blazor project only.
Change startup projects to multiple (blazor and web api app) and give httpClient url in startup of blazor application, as webApi application url, that may solve your issue.
This error indicates a mismatch of the project targeting framework version and installed runtime on the machine. So make sure that the target framework for your project matches an installed runtime - this could be verified by multiple means; one of them is to check out the Individual Components tab of the Visual Studio Installer and lookup the target version.
E.g., there is the TargetFramework attribute in the proj file:
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
Then launch the Visual Studio Installer, click Modify, and visit the Individual Components tab:
Install the missing runtime (.NET 5 Runtime in this case) and you're good to go.
I got the same error. Red herring. use your browser or postman to check your api endpoint is returning the json data and not some HTML. In my case my "api/companytypes" had a typo.
private CompanyType[] companytypesarray;
private List<CompanyType> CompanyTypeList;
private List<CompanyType> CompanyTypeList2;
public async Task<bool> LoadCompanyTypes()
{
//this works
CompanyTypeList = await Http.GetFromJsonAsync<List<CompanyType>>("api/companytype");
//this also works reading the json into an array first
companytypesarray = await Http.GetFromJsonAsync<CompanyType[]>("api/companytype");
CompanyTypeList2 = companytypesarray.ToList();
return true;
}
I know this is an old question, but I had the same problem. It took some searching, but I realized that the return data was in XML instead of JSON.
I'm assuming your "http" variable is of type HttpClient, so here's what I found worked for me.
By setting the "Accept" header to allow only JSON, you avoid a miscommunication between your app and the remote server.
http.DefaultRequestHeaders.Add("Accept", "application/json");
States = await http.GetJsonAsync<List<string>>("api/account/getstatesforprofile");
I had the same issue when passing in an empty string to a controller method. Creating a second controller method that doesn't accept any input variables, and just passing an empty string to the first method helped to fix my problem.
[HttpGet]
[ActionName("GetStuff")]
public async Task<IEnumerable<MyModel>> GetStuff()
{
return await GetStuff("");
}
[HttpGet("{search}")]
[ActionName("GetStuff")]
public async Task<IEnumerable<MyModel>> GetStuff(string search)
{
...
}
Versions of package
Try to update your packages to old or new version. In my case, system.net.http.json is updated from 6.0 to 5.0
Likely you are using an Asp.NetCore hosted WASM application. By default the client's App.razor has something similar to:
<CascadingAuthenticationState>
<Router AppAssembly="#typeof(Program).Assembly">
<Found Context="routeData">
<AuthorizeRouteView DefaultLayout="#typeof(MainLayout)"
RouteData="#routeData">
<NotAuthorized>
<RedirectToLogin />
</NotAuthorized>
<Authorizing>
<Loading Caption="Authorizing..."></Loading>
</Authorizing>
</AuthorizeRouteView>
</Found>
<NotFound>
<LayoutView Layout="#typeof(MainLayout)">
<p>Sorry, there's nothing at this address.</p>
</LayoutView>
</NotFound>
</Router>
</CascadingAuthenticationState>
Herein lies the problem. Since the Client and Server share the same base address, when the application cannot find "api/account/getstatesforprofile" it gives you the client's "Sorry, there's nothing at the address" page. Which is of course HTML.
I have not found the solution to this issue, but I am working on it and will reply once I find an issue.
I was having the same problem,
"JsonReaderException: '<' is an invalid start of a value."
In my case the url for the REST service was wrong.
I was using the URL from the client project. Then I looked at the Swagger screen,
https://localhost:44322/swagger/index.html
and noticed the right URL should start with "44322"...
Corrected, worked.
In my case, I had a comma (,) written mistakenly at the beginning of the appsettings.json file ...
Just check your file and verify
///////
my error details
//////
System.FormatException HResult=0x80131537 Message=Could not parse the JSON file.
Source=Microsoft.Extensions.Configuration.Json StackTrace: at line 16 This exception was originally thrown at this call stack: [External Code] Inner Exception 1: JsonReaderException: ',' is an invalid start of a value. LineNumber: 0 | BytePositionInLine: 0.
////
For me, most of the time it is the #lauri-peltonen answer above. However, now and again, depending on who wrote the controller I have found that this will work in Swagger but not when you call it via the client (at least in this Blazor project we are on.)
[HttpGet]
[Route("prog-map-formulations")]
public async Task<List<GetProgramMapFormulationsResult>> GetProgramMapFormulations(int formulationId)
{
...
}
It sends the request as:
api/formulation-performance-program-map/analytical-assoc-values?formulationId=1
And I get results in Swagger but failes with the '<' OP error.
When I change ONLY the route to:
[HttpGet]
[Route("prog-map-formulations/{formulationId:int}")]
public async Task<List<GetProgramMapFormulationsResult>> GetProgramMapFormulations(int formulationId)
{
...
}
It sends the request as:
api/formulation-performance-program-map/analytical-assoc-values/1
And this works in both Swagger as well as from the Client side in Blazor.
Of course, once updated, I did have to clear the cache!
If you delete "obj" folder in your directory then clean the solution and rebbuild it the exception will be resolved
In all these, there is two things that was my issue and realized, first off was that Route[("api/controller")] instead of Route[("api/[controller]")], that is missing square brackets. In the second exercise I was doing, with the first experience in mind, was from the name of the database. The database had a dot in the name (Stock.Inventory). When I change the database name to StockInventory it worked. The second one I am not so sure but it worked for me.
I downloaded Stdperiph library and i want to make USART example run on STM32F4 - Discovery. I chose STM32F40_41xxx workplace, added stm32f324x7i.c file and compiled without any errors.
Issue is that I cant receive expected message in my terminal (using Hercules), also when I check RxBuffer it is receiving some bytes but not that I sent.
I checked baudrate, wordlength, parity several times. Do you have any idea what could I do wrong?
USART conf:
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_2;
USART_InitStructure.USART_Parity = USART_Parity_Odd;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
STM_EVAL_COMInit(COM1, &USART_InitStructure);
Thank you.
First of all if you want to use hihg level abstraction libraries stop using obsolete SPL and start using HAL. Install the Cube. Generate the code - import into your favorite IDE and compile. Should work.
Your code does not show anything as USART clock may be net enabled as well as GPIOs. GPIOs may be configured wrong way. You system and peripheral clock may have wrong frequency. There are many more potential problems.
We have referred to this MSDN article for help on locking down the hardware buttons on our device.
The article is pretty straightforward and I managed to generate a prov.xml file with the help of our manufacture however when we try and upload our app to the Windows Store we get the following error:
Package acceptance validation error: File WindowsPhoneReservedAppInfo.xml is invalid: The 'Id' attribute is invalid - The value 'ID_CAP_ENTERPRISE_SHARED_DATA' is invalid according to its datatype 'http://schemas.microsoft.com/phone/2013/windowsphonereservedappinfo:ST_SoftwareCapability' - The Enumeration constraint failed.
I would have thought we would be required to include the WindowsPhoneReservedAppInfo.xml as described in the article above so that when we download the app we can lockdown the hardware buttons.
It's worth noting that if you don't have this file and attempt to lockdown you get the following error:
Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
For anyone interested in the code that does the lockdown here it is (although the code works I just thought I would try and give a bit of context):
Dim _GUID As Guid = Windows.Embedded.DeviceLockdown.DeviceLockdownProfile.GetCurrentLockdownProfile()
If Windows.Embedded.DeviceLockdown.DeviceLockdownProfile.GetLockdownProfileInformation(_GUID).Name <> "Associate" Then
For Each G As Guid In Windows.Embedded.DeviceLockdown.DeviceLockdownProfile.GetSupportedLockdownProfiles()
If (Windows.Embedded.DeviceLockdown.DeviceLockdownProfile.GetLockdownProfileInformation(G).Name.Equals("Associate", StringComparison.CurrentCultureIgnoreCase)) Then
Await Windows.Embedded.DeviceLockdown.DeviceLockdownProfile.ApplyLockdownProfileAsync(G)
End If
Next
End If
Catch ex As Exception
End Try
We use the role Associate in the prov.xml file. The prov.xml file does lockdown the device as we want it too and that only works if we have the WindowsPhoneReservedAppInfo.xml file as described in the MSDN article so I can't understand why we can't upload to the Windows Store.
Does anyone have any ideas on how I should be uploading our app to the Windows Store?
I've spoken with our manufacturer and they have said this:
I have a strong feeling this cannot be used in a store app due to Microsoft rules…. So it looks like you can only use this in an Enterprise signed application (Which you then side load onto the device or download using a MDM).
That being the case I will have to look into MDM.
I am adding new features to an app I wrote last years and is working now ... I just port the code from Appcelerator (3.2...) to the Appcelerator Studio 5.2.0.GA SDK ... and I have spent 2 days trying to figure out why code that currently works on an app in the app store is not working in the SDK 5.2.0 environment
I keep getting the above error .. I am positive the url is correct and working
This line of code works now in the app in the store and in 3.1... but is not working in 5.2.0
var jsonObject = JSON.parse(this.responseText);
It gives the above error
"JSON Parse error: Unexpected identifier \"undefined\"";
I have read their site and searched for a solution ... Thanks
entire Block
Try one thing:
Open this site and put your response data in which you are getting error https://jsonformatter.curiousconcept.com
After parsing the same data on the above site, you can check whether the problem is really in your Titanium code or in your data.
Also check whether you are really getting any response data or not.
If it does not help, then please share some necessary source code
Thanks