У пользователя часто возникают различные неполадки при использовании интернета. Сегодня речь пойдет о распространенной error 411 или ошибка 411, которая вызывает массу вопросов у новичков.
Если не пытаться устранить этот изъян, то есть 90% того, что пользователь не сможет сделать удачный запрос к сервису через определенный URL.
Полное название этого кода 411 Length Required. Первая арабская цифра обозначает состояние результата запроса пользователя, то есть HTTP. Все коды, которые начинаются с числовой последовательности в виде 4xx, обозначают статус «Client Error», а по-русски «Ошибка клиента».
Это один из пяти классов состояния кода, который описан в документе RFC, и является стандартом.
Чтобы человеку не приходилось запоминать все термины числовых обозначений, после них идёт поясняющая фраза, отделенная пробелом. Она написана на английском языке и описывает суть отказа работы клиентского запроса в сервис.
В нашем случае словосочетание «Length Required» переводится, как «Требуемая длина». По названию понятно, что задача скрывается в сердце запроса, отправляемый в сервис.
Причины появления этой ошибки
Когда в браузере появляется надпись в виде кода 411, то это свидетельствует об ограничении объёма байтов. Также причиной могут послужить вирусы или повреждённый реестр.
Ошибки запроса
Единственная причина, по которой происходит неожиданный разрыв соединения — это ошибки синтаксической структуры на сервере. Обычно появляется на запросах вида POST, иногда PUT.
Когда после отправки команды в браузере вылазит данный код ошибки, то это показывает отсутствие определенного заголовка Content-Length. В переводе означает «Длина контента».
Для устранения этих неполадок требуется в заголовке запроса указать размер Content-Length. Без написания этой строки бесполезно делать повторный запрос на определенном URL — будет такая же реакция. По существу — это количество байтов, которые указаны в кодированном заголовке. 1 символ в данном случае принимается за 1 байт.
Пример возникновения ошибки 411
Допустим, в браузере на определенном URL происходит скачивание файлов контента. Если на сервере стоит ограничение на объем байтов, то проще проверить заголовок Content-Length и, если количество файлов превышает максимальный лимит, то скачивание будет провалено.
Если игнорировать эти действия, то бесполезная сильная нагрузка сети приведет к разрыву соединения и ошибке 411. При ее появлении не забудьте подкорректировать на сервере все заголовки, чтобы робот удачно проиндексировал веб-страницу.
Признаки появления ошибки 411
Для выявления этого недуга недостаточно просто зайти в свой ПК.
Основные признаки, которые говорят о появлении ошибки, можно увидеть в ниже представленном списке:
- периодически выскакивает ошибка 411, после чего окно сайта моментально закрывается или становится неактивное;
- вместо открытого URL выскакивает надпись «Content Length Required»;
- ПК неоднократно глючит при использовании на 3-4 секунды, иногда больше;
- Windows ведёт медленную работу независимо от нагрузки жёсткого диска. С задержкой реагирует на ввод данных с клавиатуры и нажатие мышки.
Но есть и исключения, поэтому если пользователь один раз заметит ошибку, то значит сайт работает должным образом. Необходимо убедится, что код 411 вылазит из-за проблем пользователя, а не из-за плохого сайта.
Основные причины появления ошибки 411
Если вы не являетесь создателем сайта, который по своей вине не доделал заголовок в запросе, и надоедливая табличка вылазит на каждой веб-странице, то в этом виноват ваш ПК.
Есть несколько причин, из-за которых высвечивается ответ кода 411:
- попадание вредителя, который смог поменять или захватить ваш браузер;
- испорченный реестр, из-за обновления ПО в системе;
- злокачественная программа, которая изменяет конфигурацию кеша, связанный с интернет-браузером.
Ухудшение работоспособности реестра Windows обусловлено установленным вредоносным программным обеспечением. В результате это приведет не только к плохой работе сайтов, но и к появлению более опасных ошибок.
Как устранить ошибку 411?
Для устранения Content Length Required будет представлен перечень вариантов решения. Список начнется от самого простого к более сложному, поэтому рекомендуется применять способы по порядку, чтобы не тратить много сил и времени.
На данный момент известно множество способов по устранению ошибки 411:
- восстановить реестр в прежнее состояние;
- скачать защитную программу на сканирование и удаление опасного ПО;
- с помощью чистки диска провести удаление ненужных временных папок и файлов;
- установить утилиту и обновить драйвера устройств;
- использовать услугу Восстановление системы, чтобы избавиться от последних действий Windows;
- в пункте Программы и компоненты найти Windows Operating System. Требуется удалить программу, а затем снова восстановить её;
- провести проверку файлов системы. В поисковике ПК нужно ввести фразу command, затем зажатием CNTR-Shift нажать Enter. В диалоговом окне нажать на Да и продолжить работу. Мигающим курсором вести словосочетание «sfc/scannow». После нажатия Enter начнется диагностика системы на выявление проблем;
- скачать необходимые обновления для вашего Windows;
- создать резервную копию документов и заново проделать установку Windows.
Не стоит проводить восстановительные процедуры в ручную, если вы слабо владеете компьютером. По ошибке можно скачать дополнительный вирус или забыть создать резервную копию файлов.
In an HTTP request, a server will send the desired resources to your browser, allowing you to see a certain website. If something goes wrong during this process, you may see an HTTP status code like the “411 Length Required” error.
Fortunately, you can easily fix the “411 Length Required” error. This HTTP status code happens when the server requires a content-length header, but it isn’t specified in a request. To resolve this issue, you can simply define a content length.
Check Out Our Video Guide to the “411 Length Required” Error
In this post, we’ll explain the “411 Length Required” status code and what causes it. Then, we’ll show you how to locate and fix this error. Let’s get started!
What Is the “411 Length Required” Error?
Whenever you click on a link or search for a URL, your browser will send a request to the website’s server. Then, the server will process the request and respond by sending the requested data.
Although you might not see them, the server will also send a status code in the HTTP header. Your browser will only notify you of HTTP status codes if something went wrong during the request.
For example, a common HTTP status code is a 400 bad request. This is a generic client-side error that can happen when you incorrectly type a URL.
HTTP status codes are grouped into five different classes:
- 100s: Informational responses
- 200s: Successful responses
- 300s: Redirection codes
- 400s: Client-side error codes
- 500s: Server-side error codes
No idea what the “411 Length Required” error means, let alone how to fix it? 😅 Have no fear 👇Click to Tweet
Now that you know about HTTP status codes, let’s discuss the “411 Length Required” error. Since this is a less common error, you might become frustrated when it happens.
In a “411 Length Required” error, your request is rejected because it lacks a content-length header. If a server requires this information, you won’t be able to access the site without it.
What Causes the “411 Length Required” Error?
In an HTTP request and response, the client and server can place additional information in HTTP headers. Since the “411 Length Required” status code is a client-side error, this means that there was a problem with the request header.
You can use the request header to provide context about the request, allowing the server to tailor its response. The request header can include:
- Source IP address and port number
- Content-type
- Browser type (user-agent)
- Requested URL
HTTP headers can also define the size of the entity-body. By specifying the content-length value, you can let the server know the anticipated size of the request. This is identified in a decimal number of octets.
For example, you can view the content length of a web page by right-clicking on an element and selecting Inspect. Under Network, you should find information about the request header.
In general, most HTTP requests will have both a request body and content-length header. However, some clients choose not to define the content length. This can be useful when performing chunked transfer-encoding.
Sometimes, a server will indicate that it requires a content-length header. When you receive a “411 Length Required” HTTP status code, you’ll likely need to define this value to proceed with the request.
How To Locate the “411 Length Required” Error
Since the “411 Length Required” status code is a client-side error, you might not know if this is happening to your website. Fortunately, you can monitor your site’s HTTP requests so you can ensure all visitors can access your content.
With a Kinsta hosting account, you can check for failed HTTP requests directly from your MyKinsta dashboard. To do this, you can look through your website logs.
First, open MyKinsta and log in. Then, navigate to Sites and select the website you want to analyze. You’ll only be able to monitor HTTP requests on your live website, so be sure not to click on your local environment:
This will take you to the Info page, where you can see basic details about your website. On the left-hand side, click on the Logs tab:
The Log viewer will automatically be set to display your site’s error logs. Using the dropdown menu, select the access.log option:
In the access log, you can view all of the requests for your website. This will show the date, time, bytes sent, and user-agent. Here, you can also see the HTTP status codes for each request:
You’ll see a 200 code if everything processes correctly. To locate possible “411 Length Required” errors, you can use the search bar to find a 411 status code.
How To Fix the “411 Length Required” Error (4 Methods)
Although you can keep track of “411 Length Required” status codes using your website logs, keep in mind that this is a client-side issue.
That means, like all 400 HTTP status codes, the error is caused by incorrect settings on the user’s side. To fix the issue, you have to alter the HTTP request. Let’s look at four ways you may be able to do this.
1. Check the Requested URL
First, you can try some general methods to fix 400 HTTP status codes. Since the “411 Length Required” is a client-side issue, you can review the information in your request. This can ensure that the browser understands it.
When fixing any 400 status codes, it’s a good idea to review the requested URL. If you manually entered a URL to reach a website, the address may have a typo in it. To check to see if this is the problem, try re-typing the address.
If you’re sure the URL is correct but the error persists, you can enter it into a search engine along with a keyword. For instance, you can find Kinsta’s article on speeding up a WooCommerce store by searching ‘site:kinsta.com speed up WooCommerce’:
Since the “411 Length Required” error is a client-side issue, this is one basic step you can take. However, keep in mind that this may not resolve this specific status code. To do this, you’ll likely need to set a content-length header.
2. Set a Content-Length Header
If you receive a “411 Length Required” status code, the most direct way to solve this issue is by setting a content-length header. Since the server notes that content length is required to fulfill the request, it’s important to include it.
For example, if you’re sending a POST request to example.com, it may look something like this:
curl --verbose -X POST https://example.comIf you receive a “411 Length Required” status code, you’ll need to add a content-length header. This value is the number of bytes in the request. These bytes are represented by two hexadecimal digits, so you can divide the number of digits by two to determine the content length.
For example, ‘48656c6c6f21’ has 12 hexadecimal digits. To transition this value into bytes, you can divide it by two, which would make the content length 6 bytes.
Here’s what a 6 byte content length can look like in a request:
curl --verbose -X POST -H 'Content-Length: 6' https://example.comDefining the content length will likely remove the “411 Length Required” error message and send back a 200 HTTP status code. Essentially, this means that the request was processed correctly.
3. Clear Your Browser Cache
Often, determining a content-length header is all you need to do to resolve the “411 Length Required error. If you still receive this status code, however, there are some additional steps you can take.
When you first access a website, your browser stores certain data. Even after you set a content-length header, this could cause a “411 Length Required” error to appear. To remove the message, try clearing your browser cache.
If you’re using Google Chrome, click on the three-dot icon in the top right corner. Then, select More Tools > Clear Browsing Data…:
This will open a pop-up window that you can use to manage browsing history, cookies, and cached data. Make sure to select Cached images and files, along with any other information you want to clear. Finally, click on Clear data:
For Safari users, you can navigate to Safari in your toolbar. Here, select Clear history:
Then, you can choose whether to clear your entire browsing history, data from the last hour, or from the last few days. When finished, click on Clear History:
If you want to clear the cache on Mozilla Firefox, find the hamburger icon in the top-right corner. Next, select the History option:
On the next page, navigate to Clear recent history:
Be sure to select Cache and any other data you want to clear. After this, click on OK:
Now you can try your HTTP request again to see if this resolved the “411 Length Required” error!
4. Uninstall Recent Updates or Extensions
An additional way to fix the “411 Length Required” error is to disable browser extensions. Occasionally, certain extensions can interfere with your browser, making them unable to interpret requests. If you’ve installed an extension recently, you can consider removing them.
If you’re using Google Chrome, this process will be similar to clearing your browser cache. First, find the menu icon and select More Tools > Extensions:
From your list of extensions, find the one you want to remove. You can either remove them completely or simply turn them off using the slider:
Likewise, new software updates can cause HTTP error codes. To uninstall a recent Windows update, you can navigate to the Windows Update tab under Update & Security in your Settings app.
If you have a macOS operating system, this process is much more complicated. To roll back an update, you’ll need to have a Time Machine backup from before the update. Then, you can restore the data from the backup.
Keep in mind that this method should be a last resort after you’ve tried other solutions. Since you’re reverting to an older software version, you’ll likely lose important functionality and bug fixes.
This error may look intimidating, but rest assured- it couldn’t be easier to resolve it… with a little help from this guide 👀Click to Tweet
Summary
It can be frustrating when a server denies your HTTP request, displaying a “411 Length Required” error. Without specifying a content-length header, you may not be able to pull information from the server. However, there are a few ways you can resolve this issue.
To review, here’s how you can fix the “411 Length Required” error:
- Check the requested URL.
- Set a content-length header.
- Clear your browser cache.
- Uninstall recent updates or extensions.
To ensure every visitor can access your site, you might want to enable performance monitoring. With a Kinsta hosting plan, you get one of the best APM tools on the market. Using our APM dashboard, you can review external requests and immediately solve HTTP errors!
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Номер ошибки: | Ошибка HTTP 411 |
| Название ошибки: | Content Length Required | |
| Описание ошибки: | The request is missing its Content-Length header. | |
| Разработчик: | Microsoft Corporation | |
| Программное обеспечение: | Windows Operating System | |
| Относится к: | Windows XP, Vista, 7, 8, 10, 11 |
Как правило, такие Windows 10 ошибки возникают из-за повреждённых или отсутствующих файлов Content Length Required, а иногда — в результате заражения вредоносным ПО в настоящем или прошлом, что оказало влияние на Edge. Обычно, установка новой версии файла Windows 10 позволяет устранить проблему, из-за которой возникает ошибка. Мы также рекомендуем выполнить сканирование реестра, чтобы очистить все недействительные ссылки на Content Length Required, которые могут являться причиной ошибки.
Распространенные сообщения об ошибках в Content Length Required
Типичные ошибки с Content Length Required возникают в Edge для Windows включают в себя:
- «Ошибка: Content Length Required. «
- «Content Length Required удален, отсутствует или перемещен. «
- «Не удалось найти Content Length Required. «
- «Не удалось загрузить модуль Content Length Required. «
- «Ошибка регистрации: Content Length Required. «
- «Ошибка выполнения: Content Length Required.»
- «Ошибка загрузки: Content Length Required. «
Проблемы Content Length Required, связанные с Edges, возникают во время установки, при запуске или завершении работы программного обеспечения, связанного с Content Length Required, или во время процесса установки Windows. Запись ошибок Content Length Required внутри Edge имеет решающее значение для обнаружения неисправностей электронной Edge и ретрансляции обратно в Microsoft Corporation для параметров ремонта.
Истоки проблем Content Length Required
Проблемы Content Length Required могут быть отнесены к поврежденным или отсутствующим файлам, содержащим ошибки записям реестра, связанным с Content Length Required, или к вирусам / вредоносному ПО.
В частности, проблемы Content Length Required, созданные:
- Недопустимая (поврежденная) запись реестра Content Length Required.
- Файл Content Length Required поврежден от заражения вредоносными программами.
- Content Length Required злонамеренно или ошибочно удален другим программным обеспечением (кроме Edge).
- Другая программа находится в конфликте с Edge и его общими файлами ссылок.
- Неполный или поврежденный Content Length Required из ошибочной загрузки или установки.
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Are you receiving the HTTP 411 error? Are you lost as to how to fix it? You’re not alone. The HTTP 411 error can be one of the most frustrating errors to try and tackle – but don’t worry, it doesn’t have to be. We are here with your ultimate guide to understanding and fixing the HTTP 411 length required error.
This guide is designed to help even the most novice of internet users understand what this obscure error code means, why it occurs, and how you can fix it. Our team has broken down everything about the HTTP 411 Error into easy-to-understand language so that you can get back up and running in no time.
What Is 411 Http Status Code?
HTTP status code 411 is one of the many HTTP status codes of Hypertext Transfer Protocol (HTTP) used to indicate a response from a server. It occurs when the server does not receive the Content Length header in an HTTP request. This header is necessary for requests that include a message body, such as POST or PUT requests. Without it, the server cannot accurately interpret the request and must send back a 411 status code to indicate that this header field was not included in the request.
The Content Length header is an important part of many HTTP requests and helps to ensure that the message body sent in a request is properly read and interpreted by the server. Without this header, servers are unable to determine how much data has been sent, which can lead to errors or unexpected results if they inadvertently truncate or ignore data sent with a request.
When an HTTP 411 status code is received, users must resend their request with the Content Length header included so that the server can correctly interpret their request. It’s important to note that other types of HTTP status codes may be encountered when sending requests without this header field; for example, 400 Bad Request may also be returned if the malformed syntax is detected in an HTTP request.
Cause Of 411 Http Status Code Error
A 411 http status code error occurs when the server refuses to accept a request message because it is missing a defined content length in the HTTP header. This code indicates that the client must specify the Content-Length header field in its request. When this field is not present, an HTTP status of 411 will be returned to the requester.
The content length is an important part of an HTTP request message, as it specifies how much data is being sent and can be used by the server to determine if any additional information needs to be processed. Without this field, the server does not know how much data to expect and will therefore reject the request. This is why it’s essential for clients to include a valid Content-Length header field with their requests.
When sending a request and encountering a 411 error, it’s important to check that your Content-Length header field has been set correctly and contains the correct value for your request. Once you have corrected this value, retry your request and see if it succeeds. If not, then there may be another issue you need to address before your request can succeed.
What Are The Related Http Headers With 411 Http Status Code
When a certain website triggers the 411 error, it is because the server requires a request body in order to process the desired resources. This means that the client needs to define the content length header field in order to transfer the mode. The content length header field is used to specify the size of the request body, which can be done by providing either an integer or “chunked” as part of the header. When this field is not provided, a 411 error code will be displayed and prevent any further requests from being processed.
This particular header is especially important for websites that require specific data in order for them to work properly. If you fail to provide this information when making the request, then you may end up getting this error response from your server. Additionally, some servers may also require other headers to be present before they can process your request accordingly.
It’s important to know how these headers work and when they should be used so that you can avoid triggering a 411 status code error on your website. Be sure to check if any additional headers are required by your server before making any requests and make sure that all of them are included in order for your request to go through without issue.
Server Side Or Client Side Issue?
Identifying whether a 411 HTTP status code is a server-side or client-side issue can be difficult. The most effective way to tackle this error is to look at the http requests, database hosting, and application hosting associated with the requested URL. When a server denies or refuses to accept the request for a URL, it means that an error occurred on either the server or the client side. It is important to explore both possibilities in order to find out which one caused the issue.
On the server side, issues such as incorrect file permissions could be blocking access to certain pages or files on the website. Additionally, if there are any restrictions set up in your database hosting services, they could be preventing access as well. On the other hand, a client-side issue could mean that someone is attempting to access forbidden content on the website, which would cause an error message from your application hosting service.
It’s possible that both types of errors are occurring at once – for example if you have incorrect file permissions set up on your server and someone is attempting to access forbidden content. In this case, it is important to troubleshoot each possibility individually in order to get a better understanding of what exactly is causing the problem. By checking all http requests and reviewing any restrictions in place for application hosting or database hosting services associated with your requested URL, you can determine if this error is due to a server-side or client-side issue.
How To Fix 411 Http Status Code Error
When dealing with a 411 HTTP status code error, it’s important to understand how to fix it so the issue can be resolved quickly and easily. This particular error occurs when the server requires additional information from the request that was not provided. Fortunately, there are a few simple steps one can take to try and correct this issue.
One way of fixing this error is to clear the browser cache. When websites update, they may require recent updates that aren’t stored in your browser cache, resulting in an HTTP 411 error. Clearing the cache should get rid of any outdated files that are causing the problem. Additionally, one may need to enable chunked transfer encoding on their web server. This simply defines how data is broken up into smaller pieces before being sent back to the browser for processing. If this isn’t enabled, the server will return a 411 error since it won’t be able to interpret the request properly.
By taking these easy steps, anyone can fix a 411 HTTP status code error without needing any additional information or assistance from others. It’s much better than having to call tech support or spend hours trying to debug an issue that can be fixed in just a few minutes!
All HTTP status codes by categories
This is how I call a service with .NET:
var requestedURL = "https://accounts.google.com/o/oauth2/token?code=" + code + "&client_id=" + client_id + "&client_secret=" + client_secret + "&redirect_uri=" + redirect_uri + "&grant_type=authorization_code";
HttpWebRequest authRequest = (HttpWebRequest)WebRequest.Create(requestedURL);
authRequest.ContentType = "application/x-www-form-urlencoded";
authRequest.Method = "POST";
WebResponse authResponseTwitter = authRequest.GetResponse();
but when this method is invoked, I get:
Exception Details: System.Net.WebException: The remote server returned
an error: (411) Length Required.
what should I do?
huseyint
15k15 gold badges56 silver badges78 bronze badges
asked Aug 21, 2013 at 8:15
When you’re using HttpWebRequest and POST method, you have to set a content (or a body if you prefer) via the RequestStream. But, according to your code, using authRequest.Method = «GET» should be enough.
In case you’re wondering about POST format, here’s what you have to do :
ASCIIEncoding encoder = new ASCIIEncoding();
byte[] data = encoder.GetBytes(serializedObject); // a json object, or xml, whatever...
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/json";
request.ContentLength = data.Length;
request.Expect = "application/json";
request.GetRequestStream().Write(data, 0, data.Length);
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
answered Aug 21, 2013 at 8:25
AtlasmaybeAtlasmaybe
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you need to add Content-Length: 0 in your request header.
a very descriptive example of how to test is given here
answered Aug 21, 2013 at 8:26
EhsanEhsan
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When you make a POST HttpWebRequest, you must specify the length of the data you are sending, something like:
string data = "something you need to send"
byte[] postBytes = Encoding.ASCII.GetBytes(data);
request.ContentLength = postBytes.Length;
if you are not sending any data, just set it to 0, that means you just have to add to your code this line:
request.ContentLength = 0;
Usually, if you are not sending any data, chosing the GET method instead is wiser, as you can see in the HTTP RFC
answered Aug 21, 2013 at 8:25
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var requestedURL = "https://accounts.google.com/o/oauth2/token?code=" + code + "&client_id=" + client_id + "&client_secret=" + client_secret + "&redirect_uri=" + redirect_uri + "&grant_type=authorization_code";
HttpWebRequest authRequest = (HttpWebRequest)WebRequest.Create(requestedURL);
authRequest.ContentType = "application/x-www-form-urlencoded";
authRequest.Method = "POST";
//Set content length to 0
authRequest.ContentLength = 0;
WebResponse authResponseTwitter = authRequest.GetResponse();
The ContentLength property contains the value to send as the Content-length HTTP header with the request.
Any value other than -1 in the ContentLength property indicates that the request uploads data and that only methods that upload data are allowed to be set in the Method property.
After the ContentLength property is set to a value, that number of bytes must be written to the request stream that is returned by calling the GetRequestStream method or both the BeginGetRequestStream and the EndGetRequestStream methods.
for more details click here
answered Aug 21, 2015 at 9:49
Musakkhir SayyedMusakkhir Sayyed
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Change the way you requested the method from POST to GET ..
answered Nov 24, 2018 at 10:30
Hey i’m using Volley and was getting Server error 411, I added to the getHeaders method the following line :
params.put("Content-Length","0");
And it solved my issue
answered Mar 4, 2015 at 8:05
shimi_tapshimi_tap
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System.Net.WebException: The remote server returned an error: (411) Length Required.This is a pretty common issue that comes up when trying to make call a
REST based API method through POST. Luckily, there is a simple fix for
this one.This is the code I was using to call the Windows Azure Management API.
This particular API call requires the request method to be set as
POST, however there is no information that needs to be sent to the
server.
var request = (HttpWebRequest) HttpWebRequest.Create(requestUri);
request.Headers.Add("x-ms-version", "2012-08-01"); request.Method =
"POST"; request.ContentType = "application/xml";
To fix this error, add an explicit content length to your request
before making the API call.request.ContentLength = 0;
answered Aug 21, 2013 at 8:28
iabbottiabbott
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I had the same error when I imported web requests from fiddler captured sessions to Visual Studio webtests. Some POST requests did not have a StringHttpBody tag. I added an empty one to them and the error was gone. Add this after the Headers tag:
<StringHttpBody ContentType="" InsertByteOrderMark="False">
</StringHttpBody>
answered Apr 17, 2018 at 12:48
We had a very surprising cause to this error: we passed a header in which there was a newline character (in our case an Authorization bearer token header).
Our suspicion is that the newline confused the headers’ parser, and made it think there were no additional headers, which caused it to drop important headers like content-length.
answered Dec 6, 2021 at 17:17
Tama YoshiTama Yoshi
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