Parsing the header parameter in a GET request from Angular within the Spring backend

Recently, I delved into Rest services in Spring and learned from a tutorial that sending parameters to the backend can be done securely through the following method:

getCompanyDetails(username:string): Observable<CompanyObject>{
    const headers = new HttpHeaders({Authorization: 'Basic '+btoa(username)})
    return this.http.get<CompanyObject>("http://localhost:8080/company/getCompany",{headers:headers});
}

I am now seeking assistance on how to extract the username at the backend. Although my code successfully reads the "authorization" part, the username remains encoded. Is there a direct way to access this username? Below is my backend code for reference. Thank you.

@GetMapping("company/getCompany")
private void getCompany(@RequestHeader("authorization") HttpHeaders header){
    System.out.println(header);
}

Answer №1

Before adding the username to the header in your Angular code, you pass it through a function called btoa(). It seems like this function encodes the username using a specific algorithm. The response handlers in the springboot backend will not automatically decode any manually added content by a developer. Instead, they handle extracting headers from requests and decoding them when necessary, especially for standard encryptions like those used with https. However, if your Authorization value includes 'Basic' followed by some encoded value, you will need to manually decode it once you receive the value from the header at the controller.

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