From bd57c983cfb797c4bac65901e97cf8764e219649 Mon Sep 17 00:00:00 2001 From: MrMelon54 Date: Tue, 20 Feb 2024 23:51:48 +0000 Subject: [PATCH] Initial commit --- .gitignore | 1 + fromaddress.go | 26 ++++++++++++++ go.mod | 12 +++++++ go.sum | 50 ++++++++++++++++++++++++++ mail.go | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++ simplemail.go | 60 +++++++++++++++++++++++++++++++ 6 files changed, 245 insertions(+) create mode 100644 .gitignore create mode 100644 fromaddress.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 mail.go create mode 100644 simplemail.go diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..9f11b75 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +.idea/ diff --git a/fromaddress.go b/fromaddress.go new file mode 100644 index 0000000..acaa78b --- /dev/null +++ b/fromaddress.go @@ -0,0 +1,26 @@ +package simplemail + +import ( + "encoding/json" + "net/mail" +) + +type FromAddress struct { + *mail.Address +} + +var _ json.Unmarshaler = &FromAddress{} + +func (f *FromAddress) UnmarshalJSON(b []byte) error { + var a string + err := json.Unmarshal(b, &a) + if err != nil { + return err + } + address, err := mail.ParseAddress(a) + if err != nil { + return err + } + f.Address = address + return nil +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..c59d4ae --- /dev/null +++ b/go.mod @@ -0,0 +1,12 @@ +module github.com/1f349/simplemail + +go 1.22 + +require ( + github.com/1f349/overlapfs v0.0.1 + github.com/emersion/go-message v0.18.0 + github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43 + github.com/emersion/go-smtp v0.20.2 +) + +require github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594 // indirect diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..3019a5b --- /dev/null +++ b/go.sum @@ -0,0 +1,50 @@ +github.com/1f349/overlapfs v0.0.1 h1:LAxBolrXFAgU0yqZtXg/C/aaPq3eoQSPpBc49BHuTp0= +github.com/1f349/overlapfs v0.0.1/go.mod h1:I6aItQycr7nrzplmfNXp/QF9tTmKRSgY3fXmu/7Ky2o= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/emersion/go-message v0.18.0 h1:7LxAXHRpSeoO/Wom3ZApVZYG7c3d17yCScYce8WiXA8= +github.com/emersion/go-message v0.18.0/go.mod h1:Zi69ACvzaoV/MBnrxfVBPV3xWEuCmC2nEN39oJF4B8A= +github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ= +github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43 h1:hH4PQfOndHDlpzYfLAAfl63E8Le6F2+EL/cdhlkyRJY= +github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ= +github.com/emersion/go-smtp v0.20.2 h1:peX42Qnh5Q0q3vrAnRy43R/JwTnnv75AebxbkTL7Ia4= +github.com/emersion/go-smtp v0.20.2/go.mod h1:qm27SGYgoIPRot6ubfQ/GpiPy/g3PaZAVRxiO/sDUgQ= +github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594 h1:IbFBtwoTQyw0fIM5xv1HF+Y+3ZijDR839WMulgxCcUY= +github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594/go.mod h1:aqO8z8wPrjkscevZJFVE1wXJrLpC5LtJG7fqLOsPb2U= +github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= +github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= +github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk= +github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo= +github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY= +golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= +golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc= +golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4= +golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs= +golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= +golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg= +golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c= +golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs= +golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= +golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8= +golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k= +golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= +golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= +golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ= +golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8= +golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU= +golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= +golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= +golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc= +golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU= +golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/mail.go b/mail.go new file mode 100644 index 0000000..ad46f18 --- /dev/null +++ b/mail.go @@ -0,0 +1,96 @@ +package simplemail + +import ( + "bytes" + "github.com/emersion/go-message/mail" + "github.com/emersion/go-sasl" + "github.com/emersion/go-smtp" + "io" + "net" + "time" +) + +type Mail struct { + Name string `json:"name"` + Tls bool `json:"tls"` + Server string `json:"server"` + From FromAddress `json:"from"` + Username string `json:"username"` + Password string `json:"password"` +} + +func (m *Mail) loginInfo() sasl.Client { + return sasl.NewPlainClient("", m.Username, m.Password) +} + +func (m *Mail) mailCall(to []string, r io.Reader) error { + host, _, err := net.SplitHostPort(m.Server) + if err != nil { + return err + } + if m.Tls { + return smtp.SendMailTLS(m.Server, m.loginInfo(), m.From.String(), to, r) + } + if host == "localhost" || host == "127.0.0.1" { + // internals of smtp.SendMail without STARTTLS for localhost testing + dial, err := smtp.Dial(m.Server) + if err != nil { + return err + } + err = dial.Auth(m.loginInfo()) + if err != nil { + return err + } + return dial.SendMail(m.From.String(), to, r) + } + return smtp.SendMail(m.Server, m.loginInfo(), m.From.String(), to, r) +} + +func (m *Mail) SendMail(subject string, to []*mail.Address, htmlBody, textBody io.Reader) error { + // generate the email in this template + buf := new(bytes.Buffer) + + // setup mail headers + var h mail.Header + h.SetDate(time.Now()) + h.SetSubject(subject) + h.SetAddressList("From", []*mail.Address{m.From.Address}) + h.SetAddressList("To", to) + h.Set("Content-Type", "multipart/alternative") + + // setup html and text alternative headers + var hHtml, hTxt mail.InlineHeader + hHtml.Set("Content-Type", "text/html; charset=utf-8") + hTxt.Set("Content-Type", "text/plain; charset=utf-8") + + createWriter, err := mail.CreateWriter(buf, h) + if err != nil { + return err + } + inline, err := createWriter.CreateInline() + if err != nil { + return err + } + partHtml, err := inline.CreatePart(hHtml) + if err != nil { + return err + } + if _, err := io.Copy(partHtml, htmlBody); err != nil { + return err + } + partTxt, err := inline.CreatePart(hTxt) + if err != nil { + return err + } + if _, err := io.Copy(partTxt, textBody); err != nil { + return err + } + + // convert all to addresses to strings + toStr := make([]string, len(to)) + for i := range toStr { + toStr[i] = to[i].String() + } + + return m.mailCall(toStr, buf) +} diff --git a/simplemail.go b/simplemail.go new file mode 100644 index 0000000..519d1a9 --- /dev/null +++ b/simplemail.go @@ -0,0 +1,60 @@ +package simplemail + +import ( + "bytes" + "errors" + "github.com/1f349/overlapfs" + "github.com/emersion/go-message/mail" + htmlTemplate "html/template" + "io" + "io/fs" + "log" + "os" + "path/filepath" + textTemplate "text/template" +) + +type SimpleMail struct { + mailSender *Mail + htmlTemplates *htmlTemplate.Template + textTemplates *textTemplate.Template +} + +func New(sender *Mail, wd string, normal fs.FS) (simpleMail *SimpleMail, err error) { + m := &SimpleMail{mailSender: sender} + if wd != "" { + mailDir := filepath.Join(wd, "mail-templates") + err = os.Mkdir(mailDir, os.ModePerm) + if err != nil && !errors.Is(err, os.ErrExist) { + return + } + wdFs := os.DirFS(mailDir) + normal = overlapfs.OverlapFS{A: normal, B: wdFs} + } + m.htmlTemplates, err = htmlTemplate.New("mail").ParseFS(normal, "*.go.html") + if err != nil { + return + } + m.textTemplates, err = textTemplate.New("mail").ParseFS(normal, "*.go.txt") + if err != nil { + return + } + return m, nil +} + +func (m *SimpleMail) render(wrHtml, wrTxt io.Writer, name string, data any) { + err := m.htmlTemplates.ExecuteTemplate(wrHtml, name+".go.html", data) + if err != nil { + log.Printf("Failed to render mail html: %s: %s\n", name, err) + } + err = m.textTemplates.ExecuteTemplate(wrTxt, name+".go.txt", data) + if err != nil { + log.Printf("Failed to render mail text: %s: %s\n", name, err) + } +} + +func (m *SimpleMail) Send(templateName, subject string, to *mail.Address, data map[string]any) error { + var bufHtml, bufTxt bytes.Buffer + m.render(&bufHtml, &bufTxt, templateName, data) + return m.mailSender.SendMail(subject, []*mail.Address{to}, &bufHtml, &bufTxt) +}