Information Gathering

Wonitor – Fast, Zero Config Web Endpoint Change Monitor

August 21, 2020
2 Min Read
Wonitor - Fast, Zero Config Web Endpoint Change Monitor

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fast, zero config web endpoint change monitor. for comparing responses, a selected list of http headers and the full response body is stored on a local key/value store file. no configuration needed.

  • to increase network throughput, a --worker flag allows to set the concurrency when monitoring.
  • endpoints returning a javascript content type will be beautified by default.
  • using --headersOnly when adding a URL allows to only monitor response headers.


installation
Install via go or binary release:

go get -u github.com/rverton/wonitor

usage

λ $ ./wonitor
NAME:
   wonitor - web monitor
USAGE:
wonitor [global options] command [command options] [arguments...]
COMMANDS:
add, a add endpoint to monitor
delete, d deletes an endpoint
get, g get endpoint body
list, l list all monitored endpoints and their body size in bytes
monitor, m retrieve all urls and compare them
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS:
--help, -h show help (default: false)
λ $ ./wonitor add --url https://unlink.io/
+ https://unlink.io/
λ $ ./wonitor monitor --save
[https://unlink.io/] 1576b diff:
--- Original
+++ Current
@@ -1 +1,47 @@
+HTTP/1.1 200 OK
+Content-Type: text/html
+Server: nginx/1.10.3 (Ubuntu)
+X-Frame-Options: DENY
+<h tml>
+<body>
+<pre>
[... snip ...]
+</pre>
+</body>
+</html>
+
λ $ ./wonitor monitor --save
λ $ # no output because no change detected

endpoint diffing
The following headers are also included in the saved response and monitored for changes:

var headerToInclude = []string{
 "Host",
 "Content-Length",
 "Content-Type",
 "Location",
 "Access-Control-Allow-Origin",
 "Access-Control-Allow-Methods",
 "Access-Control-Expose-Headers",
 "Access-Control-Allow-Credentials",
 "Allow",
 "Content-Security-Policy",
 "Proxy-Authenticate",
 "Server",
 "WWW-Authenticate",
 "X-Frame-Options",
 "X-Powered-By",
}


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