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main.go
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main.go
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/*
* Copyright 2018-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"bytes"
"encoding/json"
"fmt"
"net/http"
"os"
"regexp"
"github.com/paketo-buildpacks/pipeline-builder/actions"
)
func main() {
inputs := actions.NewInputs()
t, ok := inputs["type"]
if !ok {
panic(fmt.Errorf("type must be specified [`sun-jvm` or `php-tar`]"))
}
user, ok := inputs["user"]
if !ok {
panic(fmt.Errorf("user must be specified"))
}
pass, ok := inputs["password"]
if !ok {
panic(fmt.Errorf("password must be specified"))
}
versions, err := FetchLatestVersions(t)
if err != nil {
panic(fmt.Errorf("unable to fetch versions\n%w", err))
}
addToken := func(request *http.Request) *http.Request {
token, err := FetchAPIToken(user, pass)
if err != nil {
panic(fmt.Errorf("unable to fetch token\n%w", err))
}
request.Header.Add("Authorization", token)
return request
}
if o, err := versions.GetLatest(inputs, addToken); err != nil {
panic(fmt.Errorf("unable to get latest\n%w", err))
} else {
o.Write(os.Stdout)
}
}
func FetchAPIToken(user, password string) (string, error) {
uri := "https://identity.msrv.saas.appdynamics.com/v2.0/oauth/token"
resp, err := http.Post(uri, "application/json",
bytes.NewBufferString(
fmt.Sprintf(`{"username": "%s","password": "%s","scopes": ["download"]}`, user, password)))
if err != nil {
return "", fmt.Errorf("unable to post %s\n%w", uri, err)
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return "", fmt.Errorf("unable to read token %s: %d", uri, resp.StatusCode)
}
var raw struct {
TokenType string `json:"token_type"`
ExpiresIn int `json:"expires_in"`
AccessToken string `json:"access_token"`
Scope string `json:"scope"`
}
if err := json.NewDecoder(resp.Body).Decode(&raw); err != nil {
return "", fmt.Errorf("unable to decode payload\n%w", err)
}
return fmt.Sprintf("%s %s", raw.TokenType, raw.AccessToken), nil
}
func FetchLatestVersions(t string) (actions.Versions, error) {
uri := "https://download.appdynamics.com/download/downloadfilelatest"
resp, err := http.Get(uri)
if err != nil {
return actions.Versions{}, fmt.Errorf("unable to get %s\n%w", uri, err)
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return actions.Versions{}, fmt.Errorf("unable to download %s: %d", uri, resp.StatusCode)
}
var raw []struct {
DownloadPath string `json:"download_path"`
FileType string `json:"filetype"`
Version string `json:"version"`
}
if err := json.NewDecoder(resp.Body).Decode(&raw); err != nil {
return actions.Versions{}, fmt.Errorf("unable to decode payload\n%w", err)
}
cp := regexp.MustCompile(`^([\d]+)\.([\d]+)\.([\d]+)[.-]?(.*)`)
versions := make(actions.Versions)
for _, r := range raw {
if t == r.FileType {
if p := cp.FindStringSubmatch(r.Version); p != nil {
v := fmt.Sprintf("%s.%s.%s", p[1], p[2], p[3])
if p[4] != "" {
v = fmt.Sprintf("%s-%s", v, p[4])
}
versions[v] = r.DownloadPath
}
break
}
}
return versions, nil
}