How to pass url arguments query string to a HTTP request on Angular

Question

I would like to trigger HTTP request from an Angular component  but I do not know how to add URL arguments  query string  to it  this http get StaticSettings BASE URL  subscribe     response    gt  this onGetForecastResult response json        error    gt  this onGetForecastError error json            gt  this onGetForecastComplete      Now my StaticSettings BASE URL is like a URL without query string like  http   atsomeplace com  but I want it to be like http   atsomeplace com  var1 val1 amp var2 val2 How to add var1  and var2 to my HTTP request object as an object      query        var1  val1      var2  val2        and then just the HTTP module does the job to parse it into URL query string

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Angular 6  You can pass in parameters needed for get call by using params   this httpClient get lt any gt  url    params  x       where x     property   123      As for the api function that logs  123    router get   example    req  res    gt        console log req query property

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You can use Url Parameters from the official documentation    Example  this httpClient get this API    params  new HttpParams   set  noCover   noCover

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Version 5  With Angular 5 and up  you DON T have to use HttpParams  You can directly send your json object as shown below  let data    limit   quot 2 quot    this httpClient get lt any gt  apiUrl   params  data     Please note that data values should be string  ie    params   limit   quot 2 quot    Version 4 3 x  Use HttpParams  HttpClient from  angular common http import   HttpParams  HttpClient   from   angular common http       constructor private httpClient  HttpClient              let params   new HttpParams    params   params append  quot page quot   1        this httpClient get lt any gt  apiUrl   params  params     Also  try stringifying your nested object using JSON stringify

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If you plan on sending more than one parameter   Component  private options       sort     -id     select  null    limit   1000    skip    0    from    null    to      null     constructor private service  Service       ngOnInit       this service getAllItems this options       subscribe  item  Item      gt          this item   item              Service  private options   new RequestOptions  headers  new Headers   Content-Type    application json       constructor private http  Http       getAllItems query  any      let params  URLSearchParams   new URLSearchParams      for let key in query       params set key toString    query key          this options search   params    this header   this headers      And continue with your http request just how  ethemsulan did   Server side route  router get   api items    req  res    gt      let q         let skip   req query skip    let limit   req query limit    let sort    req query sort    q from   req query from    q to   req query to     Items find q       skip skip       limit limit       sort sort       exec  err  items    gt          if err            return res status 500  json             title   An error occurred             error  err                           res status 200  json           message   Success           obj   items

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In latest Angular 7 8  you can use the simplest approach -  import   HttpClient  HttpHeaders  HttpParams   from   angular common http    getDetails searchParams        const httpOptions             headers     Content-Type    application json             params       searchParams             return this http get this Url  httpOptions

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My example  private options   new RequestOptions  headers  new Headers   Content-Type    application json         My method    getUserByName name  string   Observable lt MyObject   gt          set request params     let params  URLSearchParams   new URLSearchParams        params set  name   name         params set  surname   surname   for more params     this options search   params       let url    http   localhost 8080 test user        console log  url     url        return this http get url  this options         map  resp  Response    gt  resp json   as MyObject           catch this handleError          private handleError err        console log err       return Observable throw err     Server error          in my  component    userList  User           this userService getUserByName this userName  subscribe users   gt          this userList   users            By postman  http   localhost 8080 test user  name Ethem

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Edit Angular  gt   4 3 x HttpClient has been introduced along with HttpParams  Below an example of use   import   HttpParams  HttpClient   from   angular common http    constructor private http  HttpClient       let params   new HttpParams    params   params append  var1   val1   params   params append  var2   val2    this http get StaticSettings BASE URL   params  params   subscribe          Old answers  Edit Angular  gt   4 x requestOptions search has been deprecated  Use requestOptions params instead   let requestOptions   new RequestOptions    requestOptions params   params    Original answer  Angular 2  You need to import URLSearchParams as below import   Http  RequestOptions  URLSearchParams   from   angular http    And then build your parameters and make the http request as the following   let params  URLSearchParams   new URLSearchParams    params set  var1   val1   params set  var2   val2    let requestOptions   new RequestOptions    requestOptions search   params   this http get StaticSettings BASE URL  requestOptions       toPromise        then response   gt  response json

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You can use HttpParams from  angular common http and pass a string with the query  For example   import   HttpClient  HttpParams   from   angular common http   const query    key value     date 2020-03-06  const options       params  new HttpParams       fromString  query          Now in your code  this http get urlFull  options     And this works for you     I hoppe help you

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import     declare var   any      getSomeEndPoint params any   Observable lt any   gt        var qStr     param params      lt ---YOUR GUY     return this  http get this  adUrl     qStr         map  response  Response    gt   lt any   gt  response json           catch this handleError       provided that you have installed jQuery  I do npm i jquery --save and include in apps scripts in angular-cli json

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The HttpClient methods allow you to set the params in it s options   You can configure it by importing the HttpClientModule from the  angular common http package   import  HttpClientModule  from   angular common http     NgModule     imports    BrowserModule  HttpClientModule      declarations    App      bootstrap    App      export class AppModule        After that you can inject the HttpClient and use it to do the request   import  HttpClient  from   angular common http    Component     selector   my-app     template         lt div gt         lt h2 gt Hello   name   lt  h2 gt       lt  div gt          export class App     name string    constructor private httpClient  HttpClient        this httpClient get   url           params            appid   id1234           cnt   5                 observe   response              toPromise        then response   gt          console log response               catch console log             For angular versions prior to version 4 you can do the same using the Http service   The Http get method takes an object that implements RequestOptionsArgs as a second parameter   The search field of that object can be used to set a string or a URLSearchParams object   An example       Parameters obj-  let params  URLSearchParams   new URLSearchParams     params set  appid   StaticSettings API KEY    params set  cnt   days toString         Http request-  return this http get StaticSettings BASE URL       search  params     subscribe      response    gt  this onGetForecastResult response json          error    gt  this onGetForecastError error json              gt  this onGetForecastComplete           The documentation for the Http class has more details  It can be found here and an working example here

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import   Http  Response   from   angular http   constructor private  http  Http  private router  Router       return this  http get  http   url login     email         password          map  res  Response    gt               return res json               catch this  handleError

[http] How to pass url arguments (query string) to a HTTP request on Angular?

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