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1
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package dictionary |
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2
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3
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import ( |
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4
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"bufio" |
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5
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"io" |
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6
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"net/http" |
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7
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"net/url" |
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8
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"os" |
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9
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10
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"github.com/pkg/errors" |
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11
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) |
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12
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13
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const commentPrefix = "#" |
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14
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15
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func NewDictionaryFrom(path string, doer Doer) ([]string, error) { |
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16
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_, err := url.ParseRequestURI(path) |
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17
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if err != nil { |
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18
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return newDictionaryFromLocalFile(path) |
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19
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} |
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20
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21
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return newDictionaryFromRemoteFile(path, doer) |
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22
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} |
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23
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24
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func newDictionaryFromLocalFile(path string) ([]string, error) { |
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25
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file, err := os.Open(path) |
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26
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if err != nil { |
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27
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return nil, errors.Wrapf(err, "dictionary: unable to open: %s", path) |
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28
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} |
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29
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defer file.Close() |
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30
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31
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return dictionaryFromReader(file), nil |
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32
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} |
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33
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34
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func dictionaryFromReader(reader io.Reader) []string { |
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35
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entries := make([]string, 0) |
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36
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scanner := bufio.NewScanner(reader) |
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37
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for scanner.Scan() { |
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38
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line := scanner.Text() |
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39
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if isAComment(line) { |
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40
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continue |
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41
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} |
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42
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43
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entries = append(entries, line) |
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44
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} |
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45
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return entries |
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46
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} |
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47
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48
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func newDictionaryFromRemoteFile(path string, doer Doer) ([]string, error) { |
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49
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req, err := http.NewRequest(http.MethodGet, path, nil) |
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50
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if err != nil { |
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51
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return nil, errors.Wrapf(err, "dictionary: failed to build request for `%s`", path) |
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52
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} |
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53
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54
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res, err := doer.Do(req) |
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55
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if err != nil { |
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56
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return nil, errors.Wrapf(err, "dictionary: failed to get `%s`", path) |
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57
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} |
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58
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defer res.Body.Close() |
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59
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60
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statusCode := res.StatusCode |
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61
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if statusCode > 299 || statusCode < 200 { |
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62
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return nil, errors.Errorf( |
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63
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"dictionary: failed to retrieve from `%s`, status code %d", |
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64
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path, |
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65
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statusCode, |
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66
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) |
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67
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} |
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68
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69
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return dictionaryFromReader(res.Body), nil |
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70
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} |
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71
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72
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func isAComment(line string) bool { |
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73
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return line[0:1] == commentPrefix |
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74
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} |
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75
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stefanoj3 /
dirstalk
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