http.get（）返回“ 422无法处理的实体”

Question

I have written a go programme to query issues in github repository "golang:go". The http.Get() responds with status "200 OK". I then query for issues created in last 3 months and the http.Get() returns "422 Unprocessable Entity". Below is the programme

import(
        "fmt"
        "time"
        "net/http"
        "net/url"
        )

func main() {
        var ret error
        var str string 

        q:=url.QueryEscape("repo:golang/go")
        fmt.Println("q:", q)
        urlStr := "https://api.github.com/search/issues" +"?q=" + q 
        fmt.Println("urlStr:", urlStr)
        resp, ret:= http.Get(urlStr)
        fmt.Println("ret :", ret, "resp.status :", resp.Status)

        timeStr := "created:"
        to := time.Now()
        from := to.AddDate(0, -3, 0)

        str = to.Format("2006-01-02")
        timeStr = timeStr + str + ".."
        fmt.Printf("time1 : %s
", timeStr)

        str = from.Format("2006-01-02")
        timeStr = timeStr + str 
        fmt.Printf("time2 : %s
", timeStr)

        q=url.QueryEscape("repo:golang/go" + timeStr)
        fmt.Println("q:", q)
        urlStr = "https://api.github.com/search/issues" +"?q=" + q 
        fmt.Println("urlStr:", urlStr)
        resp, ret = http.Get(urlStr)
        fmt.Println("ret :", ret, "resp.status :", resp.Status) 
}   

I used this to form the query.

I am new to web programming and not able to understand where I went wrong in forming the second query.

Answer 1

two things that worked for me

1) reverse the "from" and "to" in your timeStr

2) don't use QueryEscape on the timeStr, just add it in like this

   urlStr = "https://api.github.com/search/issues" + "?q=repo:golang/go+" + timeStr

Don't use an ampersand (I originally answered with this) use a plus sign or space. See https://help.github.com/articles/searching-issues-and-pull-requests/#search-by-when-an-issue-or-pull-request-was-created-or-last-updated for the syntax

update: on further consideration the QueryEscape is a good idea! It seems coincidentally to "just work"