Binding

Parsing request data is a crucial part of a web application. In Echo this is called binding, and it can read from four parts of an HTTP request:

• URL path parameters
• URL query parameters
• Headers
• Request body

Struct tag binding

Define a struct with tags specifying the data source and key, then call c.Bind() with a pointer to it. Here the query parameter id binds to the ID field:

type User struct {
  ID string `query:"id"`
}

// handler for /users?id=<userID>
var user User
if err := c.Bind(&user); err != nil {
  return c.String(http.StatusBadRequest, "bad request")