In the network tab within the Chrome Dev Tools, I have a large amount of HTTP requests that I would like to export into a HAR to analyze. I've tried to export the HAR with the export button, and I've tried the "Save all as HAR with content" option as well, but both result in a 0byte HAR file when downloaded. I've exported HARs in the past, but I guess they've never been as large so they have succeeded without issue. For reference, the network tab shows:
9262 requests
8.6 MB transferred
21.8 MB resources
Anyone have any experience in exporting large HAR files? Is there a way to build a script that could export this?
You could try webQsee (https://chrome.google.com/webstore/detail/webqsee-web-sniffer-recor/gamdpfnfkjknkimfbboonmgdfnondfme?hl=de), it is able to handle large amounts of data.
In addition to HAR export, you can also export so called "Behavior Reports" that contain not only the network communication but also console output and the screen video for later analysis.
Related
Using the "inspect" feature, the network resources that a certain website was using. Here it's just an interactive real-time bus map.
I added just one filter, the string vehicle and filter narrows down to requests to service-status.js being made on 30 second intervals each file is 2.5kB and 102ms which was the time for the request to happen. Finally, it says 32kB / 1.9 MB transferred.
How do *.json files or a transcript of the exchanges listed here? There is a HAR file option, which saves extra information. Using the search filter, I only need a fraction of the network resources being transferred.
You could try webQsee (https://chrome.google.com/webstore/detail/webqsee-web-sniffer-recor/gamdpfnfkjknkimfbboonmgdfnondfme?hl=de), it offers a lot of filtering and export options. So you can not only export to HAR format but also to Excel.
I'm looking for a way to save chromes devtools as an html file, it's too large to copy to clipboard, and I can't dump the information I need as an HAR file as it's too large and results in a zero byte file. Any ideas?
Is there a way to create a har file with xhr request only in chrome dev tools?
Even though I can filter the requests in dev tools, when I save it as a har file, it contains all the requests.
If the dev devtools doesn't support that, is there a alternative way to do this?
Seems like there is no direct way to filter the requests. What I did was, creating the har file with all the requests and filter that file, then save it again after removing unwanted requests.
There is a entry called entries in the content inside har file. It contains all the requests we have sent in an array. I got the har file content and filtered it using JSONPath expressions.
About JSONPath, JSONPAth evaluator
Expression to filter application/json types : $..entries[?(#.response.content.mimeType == "application/json")]
After that I have replaced the entries array with the one I have filtered in the har file and saved it again. This way you can get a har file with filtered requests. Same way you can filter XHR or any other types using the relevant JSONPath expression
I recently came across this same issue while doing some research for mocking network calls in playwright. It does provide ability to record only the call you are interested in. Here is the link:
https://playwright.dev/docs/network#recording-har-with-cli
I used to download a node of firebase real-time database every day to monitor some outputs by exporting the .JSON file for that node. The JSON file itself is about 8MB.
Recently, I started receiving an error:
"Exporting JSON Unable to export The size of data exported at a single location cannot exceed 256 MB.Navigate to a smaller part of the database or use backups. Read more about limits"
Can someone please explain why I keep getting this error, since the JSON file I exported just yesterday was only 8.1 MB large.
I probably solved it! I disabled CORS addon in Chrome and suddenly it worked to export :)
To get rid of this, you can use Postman's Import feature because downloading a large JSON file sometimes faces failure in the middle of the way using a browser from the dashboard of the firebase. You can put the traditional cUrl commands on it. You just need to click save the response after the response is reached. To get rid of complex authentication complexity, you make the rule permission of the firebase database to read:true until the download is complete thought you need to ensure security for this. Postman also needs sometimes to preview the JSON even freezing the UI but you don't need to be bothered with it.
If I use wget, and get an html file from a URL. How can I generate a HAR file from that HTML file.
Any open source implementations for generating har files from html files?
Once the HAR file is generated I can read data from the HAR file using harlib.
If possible please suggest C, C++ or Java implementations.
The primary point of the HAR format is to have a standard HTTP tracing format that many tools can use and analyze. In other words, it's original intent was and primarily is, for performance analysis, not "archiving" webpages per se.
If you fetch a page with wget, you're missing 99% of all the performance data. To capture the necessary data you really need a browser to execute the requests, fetch all the associated resources, save all the timers, etc. This will enable you to build the waterfall charts, etc.
If you need to capture this data on the server, then you can use pcap to capture the TCP trace and then convert that to HAR, although you still need a client which will actually parse the HTML and request all the sub-resources (pcap is just listening in the background). Alternatively, you can route your browser through a proxy and let it spit out a HAR file for you.
Last but not least, you can just drive the browser through its debug interface and export the HAR file that way. Java example for driving Firefox: https://github.com/Filirom1/browsermob-page-perf