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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| // Package postmark uses the free https://spamcheck.postmarkapp.com/ | ||
| // See https://spamcheck.postmarkapp.com/doc/ for more details. | ||
| package postmark | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "fmt" | ||
| "net/http" | ||
| "regexp" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
||
| // Response struct | ||
| type Response struct { | ||
| Success bool `json:"success"` | ||
| Message string `json:"message"` // for errors only | ||
| Score string `json:"score"` | ||
| Rules []Rule `json:"rules"` | ||
| Report string `json:"report"` // ignored | ||
| } | ||
|
|
||
| // Rule struct | ||
| type Rule struct { | ||
| Score string `json:"score"` | ||
| // Name not returned by postmark but rather extracted from description | ||
| Name string `json:"name"` | ||
| Description string `json:"description"` | ||
| } | ||
|
|
||
| // Check will post the email data to Postmark | ||
| func Check(email []byte, timeout int) (Response, error) { | ||
| r := Response{} | ||
| // '{"email":"raw dump of email", "options":"short"}' | ||
| var d struct { | ||
| // The raw dump of the email to be filtered, including all headers. | ||
| Email string `json:"email"` | ||
| // Default "long". Must either be "long" for a full report of processing rules, or "short" for a score request. | ||
| Options string `json:"options"` | ||
| } | ||
|
|
||
| d.Email = string(email) | ||
| d.Options = "long" | ||
|
|
||
| data, err := json.Marshal(d) | ||
| if err != nil { | ||
| return r, err | ||
| } | ||
|
|
||
| client := http.Client{ | ||
| Timeout: time.Duration(timeout) * time.Second, | ||
| } | ||
|
|
||
| resp, err := client.Post("https://spamcheck.postmarkapp.com/filter", "application/json", | ||
| bytes.NewBuffer(data)) | ||
|
|
||
| if err != nil { | ||
| return r, err | ||
| } | ||
|
|
||
| defer resp.Body.Close() | ||
|
|
||
| err = json.NewDecoder(resp.Body).Decode(&r) | ||
|
|
||
| // remove trailing line spaces for all lines in report | ||
| re := regexp.MustCompile("\r?\n") | ||
| lines := re.Split(r.Report, -1) | ||
| reportLines := []string{} | ||
| for _, l := range lines { | ||
| line := strings.TrimRight(l, " ") | ||
| reportLines = append(reportLines, line) | ||
| } | ||
| reportRaw := strings.Join(reportLines, "\n") | ||
|
|
||
| // join description lines to make a single line per rule | ||
| re2 := regexp.MustCompile("\n ") | ||
| report := re2.ReplaceAllString(reportRaw, "") | ||
| for i, rule := range r.Rules { | ||
| // populate rule name | ||
| r.Rules[i].Name = nameFromReport(rule.Score, rule.Description, report) | ||
| } | ||
|
|
||
| return r, err | ||
| } | ||
|
|
||
| // Extract the name of the test from the report as Postmark does not include this in the JSON reports | ||
| func nameFromReport(score, description, report string) string { | ||
| score = regexp.QuoteMeta(score) | ||
| description = regexp.QuoteMeta(description) | ||
| str := fmt.Sprintf("%s\\s+([A-Z0-9\\_]+)\\s+%s", score, description) | ||
| re := regexp.MustCompile(str) | ||
|
|
||
| matches := re.FindAllStringSubmatch(report, 1) | ||
| if len(matches) > 0 && len(matches[0]) == 2 { | ||
| return strings.TrimSpace(matches[0][1]) | ||
| } | ||
|
|
||
| return "" | ||
| } |
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