req query and req param in ExpressJS

Question

Main differences between req query and req param in Express   How are Both different from each other When to use then in what cases   Suppose a client sends say Android  Key value  pair in the request          which one to use      EDIT   Suppose android sends a POST  request -  Intention is to send  Key Value  to client and the server should perform a database query based on the value in the server and return JSON response  Look   at this question for the program i referenced   Simple Express program for querying a result

User · Answer

req query is the query string sent to the server  example  page test 1  req param is the parameters passed to the handler   app get   user  id   handler    going to  user blah  req param id would return blah

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I would suggest using  following  req param   lt param name gt      req param     works as following  Lookup is performed in the following order   req params req body req query   Direct access to req body  req params  and req query should be favoured for clarity - unless you truly accept input from each object   Ref http   expressjs com 4x api html req param

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Passing params  GET request to   cars honda     returns a list of Honda car models  Passing query  GET request to   car honda color blue    returns a list of Honda car models   but filtered so only models with an stock color of blue are returned   It doesn t make sense to add those filters into the URL parameters   car honda color blue  because according to REST  that would imply that we want to get a bunch of information about the color  blue   Since what we really want is a filtered list of Honda models  we use query strings to filter down the results that get returned   Notice that the query strings are really just   key  value   pairs in a slightly different format   key1 value1 amp key2 value2 amp key3 value3

User · Answer

req query will return a JS object after the query string is parsed    user name tom amp age 55 - req query would yield  name  tom   age   55    req params will return parameters in the matched route  If your route is  user  id and you make a request to  user 5 - req params would yield  id   5    req param is a function that peels parameters out of the request  All of this can be found here   UPDATE  If the verb is a POST and you are using bodyParser  then you should be able to get the form body in you function with req body  That will be the parsed JS version of the POSTed form

[node.js] req.query and req.param in ExpressJS

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