How to decrypt POST request body in golang - go

I am getting my request body value in encrypted form as below:
9oF0LS0aY0RGGfUEGoT%2FHSdqypxXKh7lmaTawlekrxw%3D
But the actual value I send is:
9oF0LS0aY0RGGfUEGoT/HSdqypxXKh7lmaTawlekrxw=
Any suggestion How I can get correct value.

Your text has been url encoded. Probably because it was a query parameter ?
What you can do is use the url.QueryUnescape function to decode the value.
str := "9oF0LS0aY0RGGfUEGoT%2FHSdqypxXKh7lmaTawlekrxw%3D"
str, _ = url.QueryUnescape(str)

Related

Go: How to read from ctx.PostBody() and turn []byte into string?

How to read from ctx.PostBody() key and value?
I am using fasthttp package instead of http/net and posting from Postman the value of url
postmans result
fmt.Fprintln(ctx, string(ctx.PostBody()))
var link = ctx.PostBody()
rawBodyAsString := string(link)
println(rawBodyAsString)
I've got the string from PostBody.
the string:
----------------------------533411238113939951452693
Content-Disposition: form-data; name="url"
https://youtube.com
----------------------------533411238113939951452693--
How can I get the value only, without all these descriptions. I need the url from PostBody.
In case someone will need the solution to this:
It's FormValue syntax. Instead of PostBody.
But, I'll try to use Raw tab in Postman and json syntax to unmarshall it.

Json response in Go(Gin) without escape characters

I have recently started working on Go APIs using GIN. My API is getting the data from DB with two columns where one column contains integer and other contains a json string.
The json string is dynamic and hence i cant use struct for that.
I am using map[string]interface{} to parse the json and modify it and then parse it back to json using json.Marshal. Now i am returning this json string as a response but getting escape characters. Have done some search regarding that, but didnt find any solution yet.
Here is the part of code that i am using
var interface_obj map[string]interface{}
json.Unmarshal([]byte(grants.Data), &interface_obj)
grants_map := interface_obj["role_grants"].(map[string]interface{})
jsonString, err := json.Marshal(grants_map)
jsonBody := string(jsonString)
After this, I am returning this JSON as response in GIN framework like this
c.JSON(http.StatusCreated, gin.H{"message": "Json retrieved successfully", "data": jsonBody})
But the output i am getting is
{
"data": "[{\"action\":\"read\",\"resource\":\"project\"},{\"action\":\"all\",\"resource\":\"users\"},{\"action\":\"all\",\"resource\":\"roles\"},{\"action\":\"all\",\"resource\":\"project-settings\"},{\"action\":\"create\",\"resource\":\"single-entity-screening\"},{\"action\":\"read\",\"resource\":\"single-entity-screening\"},{\"action\":\"create\",\"resource\":\"multi-batch-screening\"},{\"action\":\"read\",\"resource\":\"multi-batch-screening\"},{\"action\":\"read\",\"resource\":\"workspace\"},{\"action\":\"allocate\",\"resource\":\"workspace\"},{\"action\":\"update\",\"resource\":\"workspace\"},{\"action\":\"read\",\"resource\":\"case\"},{\"action\":\"allocate\",\"resource\":\"case\"},{\"action\":\"review\",\"resource\":\"case\"},{\"action\":\"update\",\"resource\":\"case\"},{\"action\":\"read\",\"resource\":\"report\"},{\"action\":\"read\",\"resource\":\"audit-trail\"},{\"action\":\"read\",\"resource\":\"delivery\"}]",
"message": "Grants retrieved successfully"
}
I printed it on my console and it looked fine there, but causing this issue on response.
Is there any way to resolve this using some standard way? Please guide
Thanks
You don't need to do json.Marshal(grants_map), just pass the value directly to gin.H and let c.JSON do the encoding, i.e.
gin.H{... "data": grants_map}
And in cases where you truly have raw JSON data at hand that you want to send as part of other not-yet-JSON data, you can wrap it into json.RawMessage to avoid the "double-encoding", i.e.
gin.H{... "data": json.RawMessage(jsonBody)}

How to check if a value is present in a POST form with Go's net/http?

According to the documentation:
PostFormValue returns the first value for the named component of the POST, PATCH, or PUT request body.
URL query parameters are ignored.
PostFormValue calls ParseMultipartForm and ParseForm if necessary
and ignores any errors returned by these functions.
If key is not present, PostFormValue returns the empty string.
So the function Request.PostFormValue(key string) string returns an empty string when key does not exist in the POST body, but also when it exists and its value is empty.
How can I only check if the key is in the POST body, regardless of its value?
Parse the form and then check to see if the key is set in the post form.
req.ParseForm()
hasKey := req.PostForm.Has("key")

how to extract value from request in Jmeter

Hi I am passing an email which is a time function like below
email = ${__time(MMddyy)}_${__time(HMS)}#yopmail.com
The value of this function changes eveytime I call the variable email.
I would like to store this value that is generated from this function into a variable and use that in other requests.
So currently I am getting two different emails in two different http requests since there is some time lag between my two http requests.
what I would like to do is .. store the email that is being sent in first http request by extracting the value from the request and pass it in the second http request.
POST data:
email=062915_160738%40yopmail.com
I know the way to extract from html response.. but is there any way to extract from request in jmeter?
If so can someone pls tell me how to achieve this?
thank you
Add a Beanshell PostProcessor as a child of the request which sends that POST request
Put the following code into the PostProcessor's "Script" area
import org.apache.jmeter.config.Argument;
import org.apache.jmeter.config.Arguments;
Arguments argz = ctx.getCurrentSampler().getArguments();
for (int i = 0; i < argz.getArgumentCount(); i++) {
Argument arg = argz.getArgument(i);
if (arg.getName().equals("email")) {
vars.put("EMAIL", arg.getValue());
break;
}
}
Refer generated value as ${EMAIL} where required.
Clarification:
above code will extract the value of email request parameter (if any) and store it to EMAIL JMeter Variable
ctx - shorthand to JMeterContext class instance
vars = shorthand to JMeterVariables class instance
Arguments and Argument - you can figure that out from JMeterContext JavaDoc
See How to use BeanShell: JMeter's favorite built-in component guide for more information on Beanshell scripting in JMeter.
Instead of the entire email, you can store the timestamp value in a variable and then use this timestamp variable to create email anywhere you want.
This way you will can have same email every where.
Add a Beanshell PostProcessor & Add following script:
import org.apache.jmeter.config.Argument;
import org.apache.jmeter.config.Arguments;
Arguments argz = ctx.getCurrentSampler().getArguments();
for (int i = 0; i < argz.getArgumentCount(); i++) {
Argument arg = argz.getArgument(i);
String req_body = arg.getValue();
vars.put("req_Json",req_body);
}
here we get the output in json format:
${req_Json}=
"email":"062915_160738%40yopmail.com",
"name":"abc xyz"
Now using jp#gc Json Path Extractor extract the value of email
Json expression = $['email']
and store the value in email_value_extacted
now use the variable ${email_value_extacted} anywhere you want to use.
finally,
${email_value_extacted} = 062915_160738%40yopmail.com
Is it HTTP Sampler? If so, just put into beanshell postprocessor:
String prevQuery = prev.getQueryString(); //your request text
System.out.println(prevQuery );
Also works for any samplers:
String prevQuery = prev.getSamplerData();
You can use Regular Expression extractor to extract the e-mail address from the request URL.
Add Regular Expression Extractor as a child of sampler which sends the post request.
In the Regular Expression Extractor select URL in Response Filed to check instead of Body.
You should be able to extract e-mail id from the request in this way.

Issue on parsing string at JSON.parse

In controller side i am getting params like
"{\"violation_date\":\"sdfsdf\",\"violation_time\":\"\"},{\"violation_date\":\"sdfdsf\",\"violation_time\":\"sdfsdf\"},{\"violation_date\":\"1233\",\"violation_
time\":\"\"},{\"violation_date\":\"test\",\"violation_time\":\"time\"}"
class of this is String. I am trying to parse this. Through
JSON.parse(params_gotton)
Got
JSON::ParserError (757: unexpected token at ',{"violation_date":"sdfdsf","violation_time":"sdfsdf"},{"violation_date":"1233","violation_time":""},{"violation_d
te":"test","violation_time":"time"}'):
What i am doing wrong here. Any suggestions?
It's not valid json, this will work (use []):
require 'json'
jsn = '[{"violation_date":"sdfsdf","violation_time":""},
{"violation_date":"sdfdsf","violation_time":"sdfsdf"},
{"violation_date":"1233","violation_time":""},
{"violation_date":"test","violation_time":"time"}]'
JSON.parse(jsn) # => [{"violation_date"=>"sdfsdf", "violation_time"=>""}, {"violation_date"=>"sdfdsf", "violation_time"=>"sdfsdf"}, {"violation_date"=>"1233", "violation_time"=>""}, {"violation_date"=>"test", "violation_time"=>"time"}]
To verify json string you could use: http://www.jslint.com/.
And basic json structure: http://json.org/
UPDATED
In your case just try this:
JSON.parse('[' + params_gotton + ']')
well, received string does not contain a proper Json structure..
First convert that received param in a proper json structure and then parse it using "JSON.parse(params_gotton)".
In above received data all key and value shud be in a key value pair string format.. remove "\" symbol from received data..
it will definitely work fine..

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