JMeter Beginner Tutorial 25 - How to test File Download
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- เผยแพร่เมื่อ 13 เม.ย. 2017
- Free Tutorials - automationstepbystep.com/
Hi I am Raghav & Today we will learn:
1. How to create test for file download
Step 1: Add Thread Group - HTTP Request sampler
Step 2 : Add values in HTTP Request sampler
Step 3 : Add Listeners to view results
Step 4 : Add Listener - Save Responses to a file
Step 5 : Add values to this Listener
Step 6 : Run and Validate
______________________________________
Helpful Tips
How to avoid overwriting downloaded files.
in a multi-user test
Use function : ${__threadNum} as Prefix
___________________________________________
References :
ftp://speedtest.tele2.net/
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Thankyou, very helpful to me!
Glad it was helpful!
Good one. It Helped
Happy to know this Navin
This HTTP download request can be fit in many differrent servers, including FTP ones, right? FPT download request only fits for FPT server.
Is that the difference? Thank you.
Hi Denis, FTP Request will take connection properties from FTP Request Default, whereas HTTP Request will refer HTTP Request defaults. So FTP Req and FTP req defaults are more suited for FTP tests
Hey Raghav! Very informative content,
Can You provide some industry level scenarios, it'll help us better....!!!!
Hi Monojeet, the examples i have provided are very basic that can be used to setup tests as required in industry, I will still see if i can take some more examples that can help
Hi..
i have a question..after clicking a link some file will download on my local and it will take several minutes to take download.
does performance testing or the response time of the request will give the time taking for the download ?
response time of the request is completing in fraction of seconds , but in application itself ,the application takes several minutes to complete download of file...so how can we proceed with the issue..
Hi Rupesh, JMeter is server-side performance analysis tools. It does not take into consideration the client performance.
Thank you!
Most welcome Yaryna
Hello, thanks for your videos, I have to ask.. do you know any other kind of assertion to verify that the type of the document downloaded was correct for example like .xlsx?
Not that I know of
Thanks Raghav. I have able to setup a jmx for file download after seeing this video. Even k had set up for image download
But can u pls show some real time example when this should be used in which case. That would be really helpful
Hi Prayas, real life example will be anytime you want to do a performance test on file upload functionality.
Hi Raghav,
In our application, there is a section that will generate the graphs which testing that item, JMeter is displaying the processed data along with other important values but the graph how is plotted is not coming. Could you please help me in this like how to get the plotted graph in JMeter.
- Swati
Hi Swati, are you talking about graph assertions. You will find that in assertion video
Hi Raghav
How to download each time a new file for each loop, I noticed for multiple users it works fine but if I'm using loop controller then it's appending all the file in one single file
Hi Disha, you can use some random string to be appended to the file name
Hi Raghav,
I need help, here my scenario is, these is one preauth tab where case id displays in that cases displays there is upload document option but here this case id is unique for each user and I need to check if 100 user uploads the document at same time for their cases then what will be response
Srishti
To test the scenario where 100 users upload documents at the same time, you can use the following steps:
1. Create a JMeter test plan with a Thread Group that has 100 threads.
2. In each thread, add a HTTP Request sampler that performs the document upload.
3. In the HTTP Request sampler, set the Case ID parameter to a unique value for each thread.
4. Run the JMeter test plan.
The response that you will get will depend on the server's capacity to handle 100 concurrent document uploads. If the server is able to handle the load, then all 100 document uploads will be successful. However, if the server is not able to handle the load, then some of the document uploads may fail.
Here are some things to keep in mind when testing this scenario:
* The server's capacity will depend on a number of factors, including the server's hardware, the software that is running on the server, and the number of other requests that are being processed by the server at the same time.
* You may need to adjust the number of threads in the Thread Group to find the point at which the server starts to experience performance problems.
* You can use the JMeter Listeners to monitor the performance of the test plan. This will help you to identify any bottlenecks or performance issues.
I hope this helps
Hi Raghav, your video is very useful. I have one doubt in File Download . How can i check download file format(i need to check my file format is pdf or not). could you help me in this
Hi Sangeetha, you can use any script sampler like BeanShell or JSR223 to check the location of the file and its name
I stuck on one point and needed your help as I could not get much help on internet.
1. I am using Blazemeter to record my actions on my application.
2. In my application I have to select some criteria on UI (to download only few records) then it is downloading output report on my local as XLSX format.
Note: With this criteria report shows 10-12 records.
3. Then I am using this recorded action in JMETER to check the performance with single user.
4. This request is executing fine and getting response 200 in result tree.
5. Now I change the input criteria (changing in recorded "http request" parameter in JMeter directly) to get huge records in download file (appr. 6500 records).
6. In this case when I start running (by Click Start button), this request is showing response code "500 - Internal Server Error" in result tree.
Q1: Please tell me how to handle this case when we are downloading huge data in XLSX format on the basis of given criteria on UI?
Q2: Or is there any other way to do this kind of work i.e. instead-of recording actions by Blazemeter then play in JMeter?
Need help...
~Devesh Tapan
Hi Devesh, try out the following:
Check what does the logs say.
Can you record the scenario when you are trying to download bulk data and see if that is working fine.
Also try using HTTP Test Recorder in JMeter and see if this work - th-cam.com/video/amEHuq8auTU/w-d-xo.html
Hi Raghav. Can u please let us know how to write variables in logfile using bean shell sampler.
Hi Revanth, these links will help you:
stackoverflow.com/questions/8352281/write-extracted-data-to-a-file-using-jmeter
stackoverflow.com/questions/26179894/how-to-save-jmeter-variables-to-csv-file
sattish-performanceengg.blogspot.in/2015/05/how-to-write-data-to-csv-in-jmeter.html
Hi, Raghav! Your videos are very good! Congratulations!
Please, could you help me in the situation below?
For instance:
Page 1 (Username and Password) > Page 2 > Page 3 > Page 4 (Select an option and, after that, click the box "Download").
These actions were recorded by Badboy software.
The script was used in JMeter. As "Listener", the option "Save Responses to a file" was chosen. The result was wrong, because a file has a content similar to that of Page 1.
In a manual mode, the file must be a spreadsheet with other information.
Hi Bruno, you can try to record using blazemeter chrome plugin or JMeter http script recorder and try. Might have to do some customisations.
Hi, Raghav! Thanks a lot for your attention and advices! I'll try! Best regards.
Hi Raghav, I tried to download a csv file which actually i am getting in response.
Data is getting displayed in response perfectly but i want to see the same in downloaded file but it seems to be empty.
will need to check on this
Hi raghav,
This scenario does nt work in case of..if i need to open link and download the file..
The download file does nt have link address,
please reply
Need to record the download file scenario and everytime file downloaded is different
Okay, here the primary target is to check the performance during file download. It should be good in case that is working fine.
Hi Mr.Raghav, Is the Same procedure for Downloading .png image files also....Can u plz help me on this
Hi, yes, you can use the same process for any file download
how are you able to use FTP port in HTTP sampler for file downloading. It is failing in the jmeter 4.0 version.
Hi Bharat, is it specific for Jmeter 4.0. Working on other ver ?
@@RaghavPal even for Jmeter 5.0 not working
Hi Raghav,
I need to download a file by clicking on a button. so, what is happening is on clicking the button the data which is present on the window open gets downloaded in an excel sheet and i need that process to get automated and later compare that file. can i do this ?? if yes, can you tell me how i should try.
Hi Ekaparna, This will be part of functional testing. You will have to do scripting for this.
Hi Raghav,
Thanks, Can you please suggest some tutorials to learn that also.
Hi Raghav,
Thanks, Can you please suggest some tutorials to learn that also.
I do not know any direct link, will have to search for it
I figured it out, thanks for your help. Learnt a lot from your videos.
if i "right click " the download option ,its not able to show "copy link address" how to do it.once i click the download button its shows csv or xlsx .after selecting csv formate its show "save as " exter folder ...how to record this kind of issues
Hi, I will need to check on this
Hi Sir, in place of filename prefix, can we include variables ? ${file_save_path} ? i tried but not resolving.
jmeter.apache.org/usermanual/component_reference.html#Save_Responses_to_a_file Telling that we cannot use these variables Thanks
Hi Rajesh, sorry for late reply, Is this fixed. You can let me know more details if not yet
Automation Step by Step - Raghav Pal above link i followed sir , it is telling variables not allowed
I have a question. If I download a file (100MByte) 100 times (to test the load), the working-memory of my JMETER PC grows extremely linearly.
Does anybody have a solution ? It looks as if JMETER first packs the file into the RAM and then swaps it out into the file.
Hi Ralf
The reason why the working memory of your JMeter PC grows extremely linearly when you download a file 100 times is because JMeter is caching the file in memory. This means that JMeter is storing the entire file in memory, even after it has been downloaded.
There are a few things that you can do to solve this problem:
* You can increase the size of the JMeter heap. This will give JMeter more memory to store the file in.
* You can use the `-J-Xmx` JVM option to specify the maximum size of the JMeter heap. For example, to set the maximum size of the JMeter heap to 1024 MB, you would use the following option:
```
-J-Xmx1024m
```
* You can use the `-J-XX:MaxDirectMemorySize` JVM option to specify the maximum size of the direct memory. This is the memory that JMeter can use to store the file in a non-paged area of memory. For example, to set the maximum size of the direct memory to 1024 MB, you would use the following option:
```
-J-XX:MaxDirectMemorySize=1024m
```
* You can use the `-J-XX:+UseParallelGC` JVM option to enable parallel garbage collection. This will help JMeter to garbage collect the file more efficiently.
I hope this helps
Very helpful video. Could you please help me for folder download scenario as well.
Thanks,
Sayed
I will check Sayed
Hi, can you help me with the extension. I am able to download the file, but want to open that as excel file.
Hi Neelima, this is to download file and check the performance of file download, cannot open the file
Hi Raghav, Could u pls xplain me how to upload application/json file in request?
I will do a session on this Sri
Hi Raghav, Download API call is giving me 200 as Response code, but when i am trying to check the response data, its shows be blank array.. which actually works on front end. Is this something my script is failing? but actually i am getting 200 response code
Hi Neelima, try to add some think time between requests, Also first try with a single request and verify
Hi Raghav,
I am using JMeter ver 4.0 and ${__threadNum} function is not creating the number sequence in this. when I opened the downloads folder the files are created like this, ${__threadNum}MyFile.zip and when I choose the Don't add number to the prefix option, the files generated like this, ${__threadNum}MyFile1.zip, ${__threadNum}MyFile2.zip and ${__threadNum}MyFile3.zip ...Can you plz look into this once and try to give me a solution.
Hi Anil, Can you tell me step wise what you did. Might have to take a look into your jmx file
Hi Raghav,
1) I created the Thread Group with 3 users
2) added, HTTP Request sampler with the server name as: speedtest.tele2.net && path as: /1KB.zip
3) added the listeners, View results tree and Save response to a file
4) In the Filename prefix, I mentioned this :"C:\Users\HP\Downloads\apache-jmeter-4.0\Jmeter downloads\{__threadNum}MyFile", as a path to where the file to be downloads and selected the Don't add number to the prefix option.
Hi Anil, just see this video and check if you missed something. Here replace time function with thread func th-cam.com/video/oE8LJAbDJlM/w-d-xo.html
Try adding foreslash in front of function name i.e. /{__threadNum}MyFile.
In your case: C:\Users\HP\Downloads\apache-jmeter-4.0\Jmeter downloads\/{__threadNum}MyFile
That should solve the problem (I had the same)
Yup, it's worked.
Thanks, Nemanja.
Hi My question is I need to download pdf from my application..by doing load test....if I click on download it will ask file path to save.. one time fine but how it will do automatically.....above video scenario will work?
Hi Logesh
To automatically download a PDF file from your application using JMeter, you can use the following steps:
1. Create a new JMeter test plan.
2. Add a HTTP Request sampler to the test plan.
3. In the HTTP Request sampler, set the URL of the PDF file that you want to download.
4. Add a JSR223 Sampler to the test plan.
5. In the JSR223 Sampler, enter the following code:
```
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
public class DownloadPDF {
public void download(String url) throws Exception {
InputStream inputStream = new URL(url).openStream();
FileOutputStream outputStream = new FileOutputStream("my-pdf.pdf");
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.close();
inputStream.close();
}
}
```
This code will download the PDF file from the URL to the file `my-pdf.pdf`.
6. Run the JMeter test plan.
The PDF file will be downloaded to the specified file location.
Here are some additional tips for automatically downloading PDF files from your application using JMeter:
* You can use the `JSR223 Sampler` to execute any JavaScript code that you want. This means that you can use the `saveAs()` method to download the PDF file without having to write any custom code.
* You can use the `HTTP Request` sampler to set the cookies that are required to download the PDF file.
* You can use the `Thread Group` element to control the number of times that the PDF file is downloaded.
I hope this helps
Tanks a lot .....brother
can we download any kind of file like pdfs and all using that way
Hi Nilanjana,
Yes, it should work for all files
As your way, I tried to test a file download. However, my file is always *.unknown (instead *.xls) and I cannot open it. So, please tell me how to fix it. Thank you.
Hi Anh, how does the file downloads when you do it manually. JMeter itself should not change the extension. You can show the logs if you face any such issue.
Hi Raghav Pal,
I don't know why, but I uploaded a file with [*.xls]
After that, I downloaded that file via jMeter and I got a file with [*.unknown] so I cannot open it. I must change the extension back to [.xls] then it's ok.
Does this show the same behaviour if you download it manually.
No, it's different. The extension is always .unknown when downloading manually :D
However, I knew a way to solve it:
1. Upload a file with .xls
2. Setup in jmeter - Save Responses to a file: C:\User\Desktop\Myfile.xls
3. Checked on 2 options: Don't add number to prefix & Don't add suffix
That's all!
glad you found a solution
is it same test case for pdf download???
Hi Varsha, you can try pdf too with the same process
hi sir, in my case file is only downloaded in Text/HTML format not in .pdf format, so how to resolve this problem sir ?
Hi Shubham, will need to check the link from where you are downloading and if you are giving the request parameters correctly and completely
i have used the function ${__threadNum} but the file generated had like name : ${__threadNum}_File
Can you send a pic of your setup
@@RaghavPal i.imgur.com/mW0UYWd.png this is a screenshot && it save files w/o extension
Hi Bilal try to use forward slash / in your path or double backslash before $ \\
Hi Bilal, use forward slashes / in your path or use double backslash before $ like \\$
@@RaghavPal it work now but still saving files without extension
Hi my doubt is 10 users are there out of 10 35% users browsing 65% buying 10%0users are regisration the new users how to do that in any web application please help
Hi Rajesh, this will help you - www.blazemeter.com/blog/running-jmeter-samplers-defined-percentage-probability/
how to download pdf file after login in website using jmeter
you will need to give the link as shown here
I have added like this C:\Users\Chandrima\OneDrive\Desktop\jmeter_files\file\${__threadNum}_myfile
it is added as ${__threadNum}_myfile
Chandrima
It looks like you're trying to download files using JMeter, and you've encountered an issue with the file path. Let's address this:
1. File Path Issue:
- The path you've provided (`C:\Users\Chandrima\OneDrive\Desktop\jmeter_files\file\${__threadNum}_myfile`) contains a variable `${__threadNum}`. This variable is not being resolved correctly.
- To dynamically generate file names based on thread number, you can use JMeter's built-in functions or variables.
2. Correcting the Path:
- Instead of directly using `${__threadNum}`, you can use JMeter's built-in variable `${__threadNum}` within your path.
- Modify your path as follows:
```
C:\Users\Chandrima\OneDrive\Desktop\jmeter_files\file\${__threadNum}_myfile
```
- JMeter will replace `${__threadNum}` with the actual thread number during execution.
3. Verify Configuration:
- Ensure that your JMeter configuration is set up correctly for file downloads (e.g., HTTP Request sampler with "Save response to a file" option).
- Confirm that the file path is accessible and writable.
--
@@RaghavPal Still not solved 😥
will need to check more on this.. try checking online specially on JMeter forums