I am passing command line parameters to gatling script.
This works and executes my test in Windows operating system:
set JAVA_OPTS="-DuserCount=2 -DflowRepeatCount=3 -DdefinitionId=102168 -DtestServerUrl=https://someURL -DenvAuthenticationHeaderFromPostman="Basic UWRZm9aGwsxFsB1V7RXK0OlB5cmZvcm1hbmNldGVzdDE="
It works and takes input which is passed
**********************INPUT*************************************
User Count ====>> 2
Repeat Count ====>> 3
Definition ID ====>> 102168
Environment URL ====>> https://someURL
Authentication Header ====>> Basic UWRZm9aGwsxFsB1V7RXK0OlB5cmZvcm1hbmNldGVzdDE=
***********************************************************
I want to do this same thing on Linux System.
While if I use this command in Linux then it throws error or takes Null or Binary values as input
(Passing arguments with ./gatling.sh)
JAVA_OPTS="-DuserCount=2 -DflowRepeatCount=3 -DdefinitionId=102168 -DtestServerUrl='https://someURL' -DenvAuthenticationHeaderFromPostman='Basic UWRZm9aGwsxFsB1V7RXK0OlB5cmZvcm1hbmNldGVzdDE='" ./gatling.sh
Gives this error,
GATLING_HOME is set to /opt/gatling-charts-highcharts-2.0.3 Error:
Could not find or load main class
UWRZm9aGwsxFsB1V7RXK0OlB5cmZvcm1hbmNldGVzdDE='
Here the problem is the space given in argument of -DenvAuthenticationHeaderFromPostman='Basic UWRZm9aGwsxFsB1V7RXK0OlB5cmZvcm1hbm='.
What is the solution?
The problem is that the $JAVA_OPTS variable is probably not surrounded by quotes. See this question: Passing a space-separated System Property via a shell script doesn't work
The gatling guys clearly forgot to do that.
I would file a bug and/or just edit gatling.sh.
Ideally though you might just want to consider seeing if Gatling takes a properties file or some other way to configure.
Related
I want to find the target branch when a pull request is submitted on GitHub, in my Jenkins pipeline. To achieve this I am doing the following:
I am invoking a windows batch file from my Jenkinsfile, which in turn invokes a nodejs script. This script internally invokes GitHub APIs to get the target branch which is to be set on some variable in Jenkinsfile(code snippet given below):
Jenkinsfile
env.TARGET_BRANCH = bat "GetTargetBranchFromGit.bat ${env.BRANCH_NAME}"
BatchFile:
node getTargetBranchForPR.js %1
But unfortunately, the variable env.TARGET_BRANCH is not getting set to the target branch even though the nodejs script gets the right value. I am in fact not able to return the value from the batch file. Could someone please help me here?
#npocmaka mention is the right way: How to do I get the output of a shell command executed using into a variable from Jenkinsfile (groovy)?
Accodring to Jenkins' documentation.
returnStdout (optional) If checked, standard output from the task is
returned as the step value as a String, rather than being printed to
the build log. (Standard error, if any, will still be printed to the
log.) You will often want to call .trim() on the result to strip off a
trailing newline.
So your code should look like
env.TARGET_BRANCH = bat( script: "GetTargetBranchFromGit.bat ${env.BRANCH_NAME}",
returnStdout: true
).trim()
If you get back more than expected you probably need to parse it.
Is there a way to machine-generate some values, after the user has supplied some their values for the variables in cookiecutter.json?
The reason I ask is that:
one of the values I need to prompt for is rather hard for users to work out
but it's really easy for me to write some Python code to generate the right value
So I'd really like to be able to remove the user prompt, and calculate the value instead.
Things I've tried:
Searched online for an example pre_gen_project.py file to show how to do it
Read the cookiecutter Advanced Usage page
I'm using cookiecutter on the command line:
cookiecutter path_to_template
Am I missing any tricks?
I needed this exact capability just a few days ago. The solution I came up with was to write a wrapper script for cookiecutter, similar to what is mentioned in:
http://cookiecutter.readthedocs.io/en/latest/advanced_usage.html#calling-cookiecutter-functions-from-python
My script generates a random string for use in a Django project. I called my script cut-cut:
#! /usr/bin/env python
from cookiecutter.main import cookiecutter
import os
rstring = ''.join([c for c in os.urandom(1024)
if c.isalnum()])[:64]
cookiecutter(
'django-template', # path/url to cookiecutter template
extra_context={'secret': rstring},
)
So now I simply run cut-cut and step through the process as normal. The only difference is that the entry named secret in my cookiecutter.json file is prepopulated with the generated value in rstring from the script, provided via the extra_context passed.
You could modify the script to accept the template via the command line, but in my usage I always use the same template, thus I simply pass a hard coded value "django-template" as noted in the code above.
There is quite a common issue in unix world, that is when you start a process with parameters, one of them being sensitive, other users can read it just by executing ps -ef. (For example mysql -u root -p secret_pw
Most frequent recommendation I found was simply not to do that, never run processes with sensitive parameters, instead pass these information other way.
However, I found that some processes have the ability to change the parameter line after they processed the parameters, looking for example like this in processes:
xfreerdp -decorations /w:1903 /h:1119 /kbd:0x00000409 /d:HCG /u:petr.bena /parent-window:54526138 /bpp:24 /audio-mode: /drive:media /media /network:lan /rfx /cert-ignore /clipboard /port:3389 /v:cz-bw47.hcg.homecredit.net /p:********
Note /p:*********** parameter where password was removed somehow.
How can I do that? Is it possible for a process in linux to alter the argument list they received? I assume that simply overwriting the char **args I get in main() function wouldn't do the trick. I suppose that maybe changing some files in /proc pseudofs might work?
"hiding" like this does not work. At the end of the day there is a time window where your password is perfectly visible so this is a total non-starter, even if it is not completely useless.
The way to go is to pass the password in an environment variable.
I have a perl script that traverses a set of directories and when it hits one of them it blows up with an Invalid Argument and I want to be able to programmatically skip it. I thought I could start by finding out the file type with the file command but it too blows up like this:
$ file /sys/devices/virtual/net/br-ex/speed
/sys/devices/virtual/net/br-ex/speed: ERROR: cannot read `/sys/devices/virtual/net/br-ex/speed' (Invalid argument)
If I print out the mode of the file with the perl or python stat function it tells me 33060 but I'm not sure what all the bits mean and I'm hoping a particular one would tell me not to try to look inside. Any suggestions?
To understand the stats number you got, you need to convert the number to octal (in python oct(...)).
Then you'll see that 33060 interprets to 100444. You're interested only in the last three digits (444). The first digit is file owner permissions, the second is group and the third is everyone else.
You can look at each of the numbers (in your case all are 4) as 3 binary bits in this order:
read-write-execute.
Since in your case owner, group & other has 4, it is translated (for all of them) to 100 (in binary) which means that only the read bit is on for all three - meaning that all three can only read the file.
As far as file permissions go, you should have been successful reading /sys/devices/virtual/net/br-ex/speed.
There are two reasons for the read to fail:
- Either speed is a directory, (directories require execute permissions to read inside).
- Or it's a special file - which can be tested using the -f flag in perl or bash, or using os.path.isfile(...) in python.
Anyhow, you can use the following links to filter files & directories according to their permissions in the 3 languages you mentioned:
ways to test permissions in perl.
ways to test permissions in python.
ways to test permissions in bash.
Not related to this particular case, but I hit the same error when I ran it on a malicious ELF (Linux executable) file. In that case it was because the program headers of the ELF was intentionally corrupted. Looking at the source code for file command, this is clear as it checks the ELF headers and bails out with the same error in case the headers are corrupted:
/*
* Loop through all the program headers.
*/
for ( ; num; num--) {
if (pread(fd, xph_addr, xph_sizeof, off) <
CAST(ssize_t, xph_sizeof)) {
file_badread(ms);
return -1;
}
TLDR; The file command checks not only the magic bytes, but it also performs other checks to validate a file type.
I am trying to run the snmpget code sample in VB.NET available at:
https://github.com/lextm/sharpsnmplib/blob/master/Samples/VB.NET/snmpget/
When I try to run the code, I get the following exception:
http://i.stack.imgur.com/S5s9Z.png
The text on the exception indicates that the length of the string used to instantiate ObjectIdentifier is less than 2. However, this is not the case as seen in the watch window.
Could you let me know:
Any suggestions to fix this error. Am I not passing the command line args correctly?
Could you provide a sample command line argument string for SNMP v3?
Thank you for all the support!
The error message is clear enough that you cannot pass "0", or any other string that contains a single number. A valid OID requires at least two portion, such as "0.0".
https://sharpsnmplib.codeplex.com/wikipage?title=600001&referringTitle=KB
Command line tool usage can be found in KB6000001 and you can find other documentation on CodePlex too,
https://sharpsnmplib.codeplex.com/documentation