|
| 1 | +/* |
| 2 | +Copyright 2024 The CloudPilot AI Authors. |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, software |
| 11 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package metadata |
| 18 | + |
| 19 | +import ( |
| 20 | + "encoding/json" |
| 21 | + "errors" |
| 22 | + "fmt" |
| 23 | + "io" |
| 24 | + "net/http" |
| 25 | + "os" |
| 26 | + "reflect" |
| 27 | + "strings" |
| 28 | + "time" |
| 29 | +) |
| 30 | + |
| 31 | +const ( |
| 32 | + Endpoint = "http://100.100.100.200" |
| 33 | + regionID = "region-id" |
| 34 | +) |
| 35 | + |
| 36 | +// MetaData wrap http client |
| 37 | +type MetaData struct { |
| 38 | + // mock for unit test. |
| 39 | + mock requestMock |
| 40 | + client *http.Client |
| 41 | +} |
| 42 | + |
| 43 | +// NewMetaData returns MetaData |
| 44 | +func NewMetaData(client *http.Client) *MetaData { |
| 45 | + if client == nil { |
| 46 | + client = &http.Client{} |
| 47 | + } |
| 48 | + return &MetaData{ |
| 49 | + client: client, |
| 50 | + } |
| 51 | +} |
| 52 | + |
| 53 | +// New returns MetaDataRequest |
| 54 | +func (m *MetaData) New() *MetaDataRequest { |
| 55 | + return &MetaDataRequest{ |
| 56 | + client: m.client, |
| 57 | + sendRequest: m.mock, |
| 58 | + } |
| 59 | +} |
| 60 | + |
| 61 | +// Region returns region |
| 62 | +func (m *MetaData) Region() (string, error) { |
| 63 | + var region ResultList |
| 64 | + err := m.New().Resource(regionID).Do(®ion) |
| 65 | + if err != nil { |
| 66 | + return "", err |
| 67 | + } |
| 68 | + return region.result[0], nil |
| 69 | +} |
| 70 | + |
| 71 | +type requestMock func(resource string) (string, error) |
| 72 | + |
| 73 | +// ResultList struct |
| 74 | +type ResultList struct { |
| 75 | + result []string |
| 76 | +} |
| 77 | + |
| 78 | +// nolint: stylecheck |
| 79 | +// RoleAuth struct |
| 80 | +type RoleAuth struct { |
| 81 | + AccessKeyId string |
| 82 | + AccessKeySecret string |
| 83 | + Expiration time.Time |
| 84 | + SecurityToken string |
| 85 | + LastUpdated time.Time |
| 86 | + Code string |
| 87 | +} |
| 88 | + |
| 89 | +// MetaDataRequest struct |
| 90 | +type MetaDataRequest struct { |
| 91 | + version string |
| 92 | + resourceType string |
| 93 | + resource string |
| 94 | + subResource string |
| 95 | + client *http.Client |
| 96 | + |
| 97 | + sendRequest requestMock |
| 98 | +} |
| 99 | + |
| 100 | +// Version sets version |
| 101 | +func (r *MetaDataRequest) Version(version string) *MetaDataRequest { |
| 102 | + r.version = version |
| 103 | + return r |
| 104 | +} |
| 105 | + |
| 106 | +// ResourceType sets resource type |
| 107 | +func (r *MetaDataRequest) ResourceType(rtype string) *MetaDataRequest { |
| 108 | + r.resourceType = rtype |
| 109 | + return r |
| 110 | +} |
| 111 | + |
| 112 | +// Resource sets resource |
| 113 | +func (r *MetaDataRequest) Resource(resource string) *MetaDataRequest { |
| 114 | + r.resource = resource |
| 115 | + return r |
| 116 | +} |
| 117 | + |
| 118 | +// SubResource set sub resource |
| 119 | +func (r *MetaDataRequest) SubResource(sub string) *MetaDataRequest { |
| 120 | + r.subResource = sub |
| 121 | + return r |
| 122 | +} |
| 123 | + |
| 124 | +// URL returns url |
| 125 | +func (r *MetaDataRequest) URL() (string, error) { |
| 126 | + if r.version == "" { |
| 127 | + r.version = "latest" |
| 128 | + } |
| 129 | + if r.resourceType == "" { |
| 130 | + r.resourceType = "meta-data" |
| 131 | + } |
| 132 | + if r.resource == "" { |
| 133 | + return "", errors.New("the resource you want to visit must not be nil") |
| 134 | + } |
| 135 | + endpoint := os.Getenv("METADATA_ENDPOINT") |
| 136 | + if endpoint == "" { |
| 137 | + endpoint = Endpoint |
| 138 | + } |
| 139 | + url := fmt.Sprintf("%s/%s/%s/%s", endpoint, r.version, r.resourceType, r.resource) |
| 140 | + if r.subResource == "" { |
| 141 | + return url, nil |
| 142 | + } |
| 143 | + return fmt.Sprintf("%s/%s", url, r.subResource), nil |
| 144 | +} |
| 145 | + |
| 146 | +// Do try to do MetaDataRequest |
| 147 | +func (r *MetaDataRequest) Do(api interface{}) (err error) { |
| 148 | + res := "" |
| 149 | + |
| 150 | + if r.sendRequest != nil { |
| 151 | + res, err = r.sendRequest(r.resource) |
| 152 | + } else { |
| 153 | + res, err = r.send() |
| 154 | + } |
| 155 | + |
| 156 | + if err != nil { |
| 157 | + return err |
| 158 | + } |
| 159 | + return r.Decode(res, api) |
| 160 | +} |
| 161 | + |
| 162 | +// Decode returns decoded content |
| 163 | +func (r *MetaDataRequest) Decode(data string, api interface{}) error { |
| 164 | + if data == "" { |
| 165 | + url, _ := r.URL() |
| 166 | + return fmt.Errorf("metadata: alivpc decode data must not be nil. url=[%s]", url) |
| 167 | + } |
| 168 | + switch api := api.(type) { |
| 169 | + case *ResultList: |
| 170 | + api.result = strings.Split(data, "\n") |
| 171 | + return nil |
| 172 | + case *RoleAuth: |
| 173 | + return json.Unmarshal([]byte(data), api) |
| 174 | + default: |
| 175 | + return fmt.Errorf("metadata: unknow type to decode, type=%s", reflect.TypeOf(api)) |
| 176 | + } |
| 177 | +} |
| 178 | + |
| 179 | +func (r *MetaDataRequest) send() (string, error) { |
| 180 | + url, err := r.URL() |
| 181 | + if err != nil { |
| 182 | + return "", err |
| 183 | + } |
| 184 | + req, err := http.NewRequest(http.MethodGet, url, nil) |
| 185 | + |
| 186 | + if err != nil { |
| 187 | + return "", err |
| 188 | + } |
| 189 | + resp, err := r.client.Do(req) |
| 190 | + if err != nil { |
| 191 | + return "", err |
| 192 | + } |
| 193 | + if resp.StatusCode != 200 { |
| 194 | + return "", fmt.Errorf("aliyun Metadata API Error: Status Code: %d", resp.StatusCode) |
| 195 | + } |
| 196 | + defer resp.Body.Close() |
| 197 | + |
| 198 | + data, err := io.ReadAll(resp.Body) |
| 199 | + if err != nil { |
| 200 | + return "", err |
| 201 | + } |
| 202 | + return string(data), nil |
| 203 | +} |
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