Платформа ЦРНП "Мирокод" для разработки проектов
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236 lines
5.8 KiB
236 lines
5.8 KiB
// Copyright 2012-present Oliver Eilhard. All rights reserved. |
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// Use of this source code is governed by a MIT-license. |
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// See http://olivere.mit-license.org/license.txt for details. |
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package elastic |
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import ( |
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"context" |
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"fmt" |
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"net/http" |
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"net/url" |
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"strings" |
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"github.com/olivere/elastic/v7/uritemplates" |
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) |
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// ExistsService checks for the existence of a document using HEAD. |
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// |
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// See https://www.elastic.co/guide/en/elasticsearch/reference/7.0/docs-get.html |
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// for details. |
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type ExistsService struct { |
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client *Client |
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pretty *bool // pretty format the returned JSON response |
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human *bool // return human readable values for statistics |
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errorTrace *bool // include the stack trace of returned errors |
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filterPath []string // list of filters used to reduce the response |
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headers http.Header // custom request-level HTTP headers |
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id string |
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index string |
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typ string |
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preference string |
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realtime *bool |
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refresh string |
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routing string |
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parent string |
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} |
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// NewExistsService creates a new ExistsService. |
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func NewExistsService(client *Client) *ExistsService { |
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return &ExistsService{ |
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client: client, |
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typ: "_doc", |
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} |
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} |
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// Pretty tells Elasticsearch whether to return a formatted JSON response. |
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func (s *ExistsService) Pretty(pretty bool) *ExistsService { |
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s.pretty = &pretty |
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return s |
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} |
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// Human specifies whether human readable values should be returned in |
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// the JSON response, e.g. "7.5mb". |
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func (s *ExistsService) Human(human bool) *ExistsService { |
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s.human = &human |
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return s |
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} |
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// ErrorTrace specifies whether to include the stack trace of returned errors. |
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func (s *ExistsService) ErrorTrace(errorTrace bool) *ExistsService { |
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s.errorTrace = &errorTrace |
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return s |
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} |
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// FilterPath specifies a list of filters used to reduce the response. |
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func (s *ExistsService) FilterPath(filterPath ...string) *ExistsService { |
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s.filterPath = filterPath |
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return s |
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} |
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// Header adds a header to the request. |
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func (s *ExistsService) Header(name string, value string) *ExistsService { |
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if s.headers == nil { |
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s.headers = http.Header{} |
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} |
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s.headers.Add(name, value) |
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return s |
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} |
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// Headers specifies the headers of the request. |
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func (s *ExistsService) Headers(headers http.Header) *ExistsService { |
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s.headers = headers |
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return s |
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} |
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// Id is the document ID. |
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func (s *ExistsService) Id(id string) *ExistsService { |
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s.id = id |
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return s |
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} |
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// Index is the name of the index. |
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func (s *ExistsService) Index(index string) *ExistsService { |
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s.index = index |
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return s |
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} |
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// Type is the type of the document (use `_all` to fetch the first document |
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// matching the ID across all types). |
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func (s *ExistsService) Type(typ string) *ExistsService { |
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s.typ = typ |
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return s |
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} |
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// Preference specifies the node or shard the operation should be performed on (default: random). |
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func (s *ExistsService) Preference(preference string) *ExistsService { |
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s.preference = preference |
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return s |
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} |
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// Realtime specifies whether to perform the operation in realtime or search mode. |
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func (s *ExistsService) Realtime(realtime bool) *ExistsService { |
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s.realtime = &realtime |
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return s |
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} |
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// Refresh the shard containing the document before performing the operation. |
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// |
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// See https://www.elastic.co/guide/en/elasticsearch/reference/7.0/docs-refresh.html |
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// for details. |
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func (s *ExistsService) Refresh(refresh string) *ExistsService { |
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s.refresh = refresh |
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return s |
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} |
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// Routing is a specific routing value. |
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func (s *ExistsService) Routing(routing string) *ExistsService { |
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s.routing = routing |
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return s |
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} |
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// Parent is the ID of the parent document. |
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func (s *ExistsService) Parent(parent string) *ExistsService { |
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s.parent = parent |
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return s |
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} |
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// buildURL builds the URL for the operation. |
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func (s *ExistsService) buildURL() (string, url.Values, error) { |
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// Build URL |
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path, err := uritemplates.Expand("/{index}/{type}/{id}", map[string]string{ |
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"id": s.id, |
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"index": s.index, |
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"type": s.typ, |
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}) |
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if err != nil { |
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return "", url.Values{}, err |
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} |
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// Add query string parameters |
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params := url.Values{} |
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if v := s.pretty; v != nil { |
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params.Set("pretty", fmt.Sprint(*v)) |
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} |
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if v := s.human; v != nil { |
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params.Set("human", fmt.Sprint(*v)) |
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} |
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if v := s.errorTrace; v != nil { |
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params.Set("error_trace", fmt.Sprint(*v)) |
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} |
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if len(s.filterPath) > 0 { |
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params.Set("filter_path", strings.Join(s.filterPath, ",")) |
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} |
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if s.realtime != nil { |
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params.Set("realtime", fmt.Sprint(*s.realtime)) |
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} |
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if s.refresh != "" { |
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params.Set("refresh", s.refresh) |
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} |
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if s.routing != "" { |
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params.Set("routing", s.routing) |
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} |
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if s.parent != "" { |
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params.Set("parent", s.parent) |
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} |
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if s.preference != "" { |
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params.Set("preference", s.preference) |
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} |
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return path, params, nil |
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} |
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// Validate checks if the operation is valid. |
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func (s *ExistsService) Validate() error { |
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var invalid []string |
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if s.id == "" { |
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invalid = append(invalid, "Id") |
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} |
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if s.index == "" { |
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invalid = append(invalid, "Index") |
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} |
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if s.typ == "" { |
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invalid = append(invalid, "Type") |
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} |
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if len(invalid) > 0 { |
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return fmt.Errorf("missing required fields: %v", invalid) |
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} |
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return nil |
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} |
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// Do executes the operation. |
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func (s *ExistsService) Do(ctx context.Context) (bool, error) { |
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// Check pre-conditions |
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if err := s.Validate(); err != nil { |
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return false, err |
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} |
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// Get URL for request |
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path, params, err := s.buildURL() |
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if err != nil { |
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return false, err |
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} |
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// Get HTTP response |
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res, err := s.client.PerformRequest(ctx, PerformRequestOptions{ |
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Method: "HEAD", |
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Path: path, |
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Params: params, |
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IgnoreErrors: []int{404}, |
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Headers: s.headers, |
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}) |
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if err != nil { |
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return false, err |
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} |
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// Return operation response |
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switch res.StatusCode { |
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case http.StatusOK: |
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return true, nil |
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case http.StatusNotFound: |
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return false, nil |
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default: |
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return false, fmt.Errorf("elastic: got HTTP code %d when it should have been either 200 or 404", res.StatusCode) |
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} |
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}
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