web ui: index and basic details page, api refactoring

README.md

@@ -24,13 +24,17 @@ variables:
   * **LOGGING_DEBUG** — enable debug logs (default `false`)
 * **API**
   * **API_ADDRESS** — address the API server will listen (default `0.0.0.0:5001`)
+* **UI**
+  * **UI_ENABLED** — Enable builtin web UI (default `true`)
+  * **UI_PREFIX** — Prefix for the web UI (default `/`)
+  * **UI_THEME** — UI theme name (default `basic`). No other values available yet
 * **PDF**
   * **PDF_LANDSCAPE** — use landscape page orientation instead of portrait (default `false`)
   * **PDF_GRAYSCALE** — use grayscale filter for the output pdf (default `false`)
   * **PDF_MEDIA_PRINT** — use media type `print` for the request (default `true`)
   * **PDF_ZOOM** — zoom page (default `1.0` i.e. no actual zoom)
-  * **PDF_VIEWPORT** — use specified viewport value (default `1920x1080`)
-  * **PDF_DPI** — use specified DPI value for the output pdf (default `300`)
+  * **PDF_VIEWPORT** — use specified viewport value (default `1280x720`)
+  * **PDF_DPI** — use specified DPI value for the output pdf (default `150`)
   * **PDF_FILENAME** — use specified name for output pdf file (default `page.pdf`)
 
 
@@ -60,7 +64,7 @@ docker compose up -d webarchive
 ### 2. Add a page
 
 ```shell
-curl -X POST --location "http://localhost:5001/pages" \
+curl -X POST --location "http://localhost:5001/api/v1/pages" \
     -H "Content-Type: application/json" \
     -d "{
           \"url\": \"https://github.com/wkhtmltopdf/wkhtmltopdf/issues/1937\",
@@ -75,13 +79,13 @@ or
 
 ```shell
 curl -X POST --location \
-  "http://localhost:5001/pages?url=https%3A%2F%2Fgithub.com%2Fwkhtmltopdf%2Fwkhtmltopdf%2Fissues%2F1937&formats=pdf%2Cheaders&description=Foo+Bar"
+  "http://localhost:5001/api/v1/pages?url=https%3A%2F%2Fgithub.com%2Fwkhtmltopdf%2Fwkhtmltopdf%2Fissues%2F1937&formats=pdf%2Cheaders&description=Foo+Bar"
 ```
 
 ### 3. Get the page's info
 
 ```shell
-curl -X GET --location "http://localhost:5001/pages/$page_id" | jq .
+curl -X GET --location "http://localhost:5001/api/v1/pages/$page_id" | jq .
 ```
 where `$page_id` — value of the `id` field from previous command response.
 If `status` field in response is `success` (or `with_errors`) - the `results` field
@@ -90,7 +94,7 @@ will contain all processed formats with ids of the stored files.
 ### 4. Open file in browser
 
 ```shell
-xdg-open "http://localhost:5001/pages/$page_id/file/$file_id"
+xdg-open "http://localhost:5001/api/v1/pages/$page_id/file/$file_id"
 ```
 Where  `$page_id` — value of the `id` field from previous command response, and
 `$file_id` — the id of interesting file.
@@ -98,7 +102,7 @@ Where  `$page_id` — value of the `id` field from previous command response, an
 ### 5. List all stored pages
 
 ```shell
-curl -X GET --location "http://localhost:5001/pages" | jq .
+curl -X GET --location "http://localhost:5001/api/v1/pages" | jq .
 ```
 
 ## Roadmap

adapters/processors/pdf.go

@@ -47,6 +47,7 @@ func (p *PDF) Process(_ context.Context, url string) ([]entity.File, error) {
 	page.FooterFontSize.Set(10)
 	page.Zoom.Set(p.cfg.Zoom)
 	page.ViewportSize.Set(p.cfg.Viewport)
+	page.NoBackground.Set(true)
 
 	gen.AddPage(page)
 

adapters/processors/processors.go

@@ -8,6 +8,8 @@ import (
 	"net/http/cookiejar"
 	"time"
 
+	"golang.org/x/net/html"
+
 	"github.com/derfenix/webarchive/config"
 	"github.com/derfenix/webarchive/entity"
 )
@@ -52,6 +54,7 @@ func NewProcessors(cfg config.Config) (*Processors, error) {
 	}
 
 	procs := Processors{
+		client: httpClient,
 		processors: map[entity.Format]processor{
 			entity.FormatHeaders:    NewHeaders(httpClient),
 			entity.FormatPDF:        NewPDF(cfg.PDF),
@@ -64,6 +67,7 @@ func NewProcessors(cfg config.Config) (*Processors, error) {
 
 type Processors struct {
 	processors map[entity.Format]processor
+	client     *http.Client
 }
 
 func (p *Processors) Process(ctx context.Context, format entity.Format, url string) entity.Result {
@@ -93,3 +97,62 @@ func (p *Processors) OverrideProcessor(format entity.Format, proc processor) err
 
 	return nil
 }
+
+func (p *Processors) GetMeta(ctx context.Context, url string) (entity.Meta, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return entity.Meta{}, fmt.Errorf("new request: %w", err)
+	}
+
+	response, err := p.client.Do(req)
+	if err != nil {
+		return entity.Meta{}, fmt.Errorf("do request: %w", err)
+	}
+
+	if response.StatusCode != http.StatusOK {
+		return entity.Meta{}, fmt.Errorf("want status 200, got %d", response.StatusCode)
+	}
+
+	if response.Body == nil {
+		return entity.Meta{}, fmt.Errorf("empty response body")
+	}
+
+	defer func() {
+		_ = response.Body.Close()
+	}()
+
+	htmlNode, err := html.Parse(response.Body)
+	if err != nil {
+		return entity.Meta{}, fmt.Errorf("parse response body: %w", err)
+	}
+
+	meta := entity.Meta{}
+	getMetaData(htmlNode, &meta)
+
+	return meta, nil
+}
+
+func getMetaData(n *html.Node, meta *entity.Meta) {
+	if n == nil {
+		return
+	}
+
+	for c := n.FirstChild; c != nil; c = c.NextSibling {
+		if c.Type == html.ElementNode && c.Data == "title" {
+			meta.Title = c.FirstChild.Data
+		}
+		if c.Type == html.ElementNode && c.Data == "meta" {
+			attrs := make(map[string]string)
+			for _, attr := range c.Attr {
+				attrs[attr.Key] = attr.Val
+			}
+
+			name, ok := attrs["name"]
+			if ok && name == "description" {
+				meta.Description = attrs["content"]
+			}
+		}
+
+		getMetaData(c, meta)
+	}
+}

adapters/repository/badger/page.go

@@ -64,18 +64,18 @@ func (p *Page) GetFile(_ context.Context, pageID, fileID uuid.UUID) (*entity.Fil
 	return file, nil
 }
 
-func (p *Page) Save(_ context.Context, site *entity.Page) error {
+func (p *Page) Save(_ context.Context, page *entity.Page) error {
 	if p.db.IsClosed() {
 		return ErrDBClosed
 	}
 
-	marshaled, err := marshal(site)
+	marshaled, err := marshal(page)
 	if err != nil {
 		return fmt.Errorf("marshal data: %w", err)
 	}
 
 	if err := p.db.Update(func(txn *badger.Txn) error {
-		if err := txn.Set(p.key(site), marshaled); err != nil {
+		if err := txn.Set(p.key(page), marshaled); err != nil {
 			return fmt.Errorf("put data: %w", err)
 		}
 
@@ -151,6 +151,64 @@ func (p *Page) ListAll(ctx context.Context) ([]*entity.Page, error) {
 				Formats:     page.Formats,
 				Version:     page.Version,
 				Status:      page.Status,
+				Meta:        page.Meta,
+			})
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		return nil, fmt.Errorf("view: %w", err)
+	}
+
+	sort.Slice(pages, func(i, j int) bool {
+		return pages[i].Created.After(pages[j].Created)
+	})
+
+	return pages, nil
+}
+
+func (p *Page) ListUnprocessed(ctx context.Context) ([]*entity.Page, error) {
+	pages := make([]*entity.Page, 0, 100)
+
+	err := p.db.View(func(txn *badger.Txn) error {
+		iterator := txn.NewIterator(badger.DefaultIteratorOptions)
+
+		defer iterator.Close()
+
+		for iterator.Seek(p.prefix); iterator.ValidForPrefix(p.prefix); iterator.Next() {
+			if err := ctx.Err(); err != nil {
+				return fmt.Errorf("context canceled: %w", err)
+			}
+
+			var page entity.Page
+
+			err := iterator.Item().Value(func(val []byte) error {
+				if err := unmarshal(val, &page); err != nil {
+					return fmt.Errorf("unmarshal: %w", err)
+				}
+
+				return nil
+			})
+
+			if err != nil {
+				return fmt.Errorf("get item: %w", err)
+			}
+
+			if page.Status != entity.StatusProcessing {
+				continue
+			}
+
+			pages = append(pages, &entity.Page{
+				ID:          page.ID,
+				URL:         page.URL,
+				Description: page.Description,
+				Created:     page.Created,
+				Formats:     page.Formats,
+				Version:     page.Version,
+				Status:      page.Status,
+				Meta:        page.Meta,
 			})
 		}
 

api/openapi.yaml

@@ -4,7 +4,7 @@ info:
   description: API description in Markdown.
   version: 1.0.0
 servers:
-  - url: 'https://api.example.com'
+  - url: 'https://api.example.com/api/v1'
 paths:
   /pages:
     get:
@@ -183,12 +183,25 @@ components:
             $ref: '#/components/schemas/format'
         status:
           $ref: '#/components/schemas/status'
+        meta:
+          type: object
+          properties:
+            title:
+              type: string
+            description:
+              type: string
+            error:
+              type: string
+          required:
+            - title
+            - description
       required:
         - id
         - url
         - formats
         - status
         - created
+        - meta
     result:
       type: object
       properties:

api/openapi/oas_json_gen.go

@@ -534,14 +534,20 @@ func (s *Page) encodeFields(e *jx.Encoder) {
 		e.FieldStart("status")
 		s.Status.Encode(e)
 	}
+	{
+
+		e.FieldStart("meta")
+		s.Meta.Encode(e)
+	}
 }
 
-var jsonFieldsNameOfPage = [5]string{
+var jsonFieldsNameOfPage = [6]string{
 	0: "id",
 	1: "url",
 	2: "created",
 	3: "formats",
 	4: "status",
+	5: "meta",
 }
 
 // Decode decodes Page from json.
@@ -617,6 +623,16 @@ func (s *Page) Decode(d *jx.Decoder) error {
 			}(); err != nil {
 				return errors.Wrap(err, "decode field \"status\"")
 			}
+		case "meta":
+			requiredBitSet[0] |= 1 << 5
+			if err := func() error {
+				if err := s.Meta.Decode(d); err != nil {
+					return err
+				}
+				return nil
+			}(); err != nil {
+				return errors.Wrap(err, "decode field \"meta\"")
+			}
 		default:
 			return d.Skip()
 		}
@@ -627,7 +643,7 @@ func (s *Page) Decode(d *jx.Decoder) error {
 	// Validate required fields.
 	var failures []validate.FieldError
 	for i, mask := range [1]uint8{
-		0b00011111,
+		0b00111111,
 	} {
 		if result := (requiredBitSet[i] & mask) ^ mask; result != 0 {
 			// Mask only required fields and check equality to mask using XOR.
@@ -673,6 +689,138 @@ func (s *Page) UnmarshalJSON(data []byte) error {
 	return s.Decode(d)
 }
 
+// Encode implements json.Marshaler.
+func (s *PageMeta) Encode(e *jx.Encoder) {
+	e.ObjStart()
+	s.encodeFields(e)
+	e.ObjEnd()
+}
+
+// encodeFields encodes fields.
+func (s *PageMeta) encodeFields(e *jx.Encoder) {
+	{
+
+		e.FieldStart("title")
+		e.Str(s.Title)
+	}
+	{
+
+		e.FieldStart("description")
+		e.Str(s.Description)
+	}
+	{
+		if s.Error.Set {
+			e.FieldStart("error")
+			s.Error.Encode(e)
+		}
+	}
+}
+
+var jsonFieldsNameOfPageMeta = [3]string{
+	0: "title",
+	1: "description",
+	2: "error",
+}
+
+// Decode decodes PageMeta from json.
+func (s *PageMeta) Decode(d *jx.Decoder) error {
+	if s == nil {
+		return errors.New("invalid: unable to decode PageMeta to nil")
+	}
+	var requiredBitSet [1]uint8
+
+	if err := d.ObjBytes(func(d *jx.Decoder, k []byte) error {
+		switch string(k) {
+		case "title":
+			requiredBitSet[0] |= 1 << 0
+			if err := func() error {
+				v, err := d.Str()
+				s.Title = string(v)
+				if err != nil {
+					return err
+				}
+				return nil
+			}(); err != nil {
+				return errors.Wrap(err, "decode field \"title\"")
+			}
+		case "description":
+			requiredBitSet[0] |= 1 << 1
+			if err := func() error {
+				v, err := d.Str()
+				s.Description = string(v)
+				if err != nil {
+					return err
+				}
+				return nil
+			}(); err != nil {
+				return errors.Wrap(err, "decode field \"description\"")
+			}
+		case "error":
+			if err := func() error {
+				s.Error.Reset()
+				if err := s.Error.Decode(d); err != nil {
+					return err
+				}
+				return nil
+			}(); err != nil {
+				return errors.Wrap(err, "decode field \"error\"")
+			}
+		default:
+			return d.Skip()
+		}
+		return nil
+	}); err != nil {
+		return errors.Wrap(err, "decode PageMeta")
+	}
+	// Validate required fields.
+	var failures []validate.FieldError
+	for i, mask := range [1]uint8{
+		0b00000011,
+	} {
+		if result := (requiredBitSet[i] & mask) ^ mask; result != 0 {
+			// Mask only required fields and check equality to mask using XOR.
+			//
+			// If XOR result is not zero, result is not equal to expected, so some fields are missed.
+			// Bits of fields which would be set are actually bits of missed fields.
+			missed := bits.OnesCount8(result)
+			for bitN := 0; bitN < missed; bitN++ {
+				bitIdx := bits.TrailingZeros8(result)
+				fieldIdx := i*8 + bitIdx
+				var name string
+				if fieldIdx < len(jsonFieldsNameOfPageMeta) {
+					name = jsonFieldsNameOfPageMeta[fieldIdx]
+				} else {
+					name = strconv.Itoa(fieldIdx)
+				}
+				failures = append(failures, validate.FieldError{
+					Name:  name,
+					Error: validate.ErrFieldRequired,
+				})
+				// Reset bit.
+				result &^= 1 << bitIdx
+			}
+		}
+	}
+	if len(failures) > 0 {
+		return &validate.Error{Fields: failures}
+	}
+
+	return nil
+}
+
+// MarshalJSON implements stdjson.Marshaler.
+func (s *PageMeta) MarshalJSON() ([]byte, error) {
+	e := jx.Encoder{}
+	s.Encode(&e)
+	return e.Bytes(), nil
+}
+
+// UnmarshalJSON implements stdjson.Unmarshaler.
+func (s *PageMeta) UnmarshalJSON(data []byte) error {
+	d := jx.DecodeBytes(data)
+	return s.Decode(d)
+}
+
 // Encode implements json.Marshaler.
 func (s *PageWithResults) Encode(e *jx.Encoder) {
 	e.ObjStart()
@@ -711,6 +859,11 @@ func (s *PageWithResults) encodeFields(e *jx.Encoder) {
 		e.FieldStart("status")
 		s.Status.Encode(e)
 	}
+	{
+
+		e.FieldStart("meta")
+		s.Meta.Encode(e)
+	}
 	{
 
 		e.FieldStart("results")
@@ -722,13 +875,14 @@ func (s *PageWithResults) encodeFields(e *jx.Encoder) {
 	}
 }
 
-var jsonFieldsNameOfPageWithResults = [6]string{
+var jsonFieldsNameOfPageWithResults = [7]string{
 	0: "id",
 	1: "url",
 	2: "created",
 	3: "formats",
 	4: "status",
-	5: "results",
+	5: "meta",
+	6: "results",
 }
 
 // Decode decodes PageWithResults from json.
@@ -804,8 +958,18 @@ func (s *PageWithResults) Decode(d *jx.Decoder) error {
 			}(); err != nil {
 				return errors.Wrap(err, "decode field \"status\"")
 			}
-		case "results":
+		case "meta":
 			requiredBitSet[0] |= 1 << 5
+			if err := func() error {
+				if err := s.Meta.Decode(d); err != nil {
+					return err
+				}
+				return nil
+			}(); err != nil {
+				return errors.Wrap(err, "decode field \"meta\"")
+			}
+		case "results":
+			requiredBitSet[0] |= 1 << 6
 			if err := func() error {
 				s.Results = make([]Result, 0)
 				if err := d.Arr(func(d *jx.Decoder) error {
@@ -832,7 +996,7 @@ func (s *PageWithResults) Decode(d *jx.Decoder) error {
 	// Validate required fields.
 	var failures []validate.FieldError
 	for i, mask := range [1]uint8{
-		0b00111111,
+		0b01111111,
 	} {
 		if result := (requiredBitSet[i] & mask) ^ mask; result != 0 {
 			// Mask only required fields and check equality to mask using XOR.
@@ -878,6 +1042,138 @@ func (s *PageWithResults) UnmarshalJSON(data []byte) error {
 	return s.Decode(d)
 }
 
+// Encode implements json.Marshaler.
+func (s *PageWithResultsMeta) Encode(e *jx.Encoder) {
+	e.ObjStart()
+	s.encodeFields(e)
+	e.ObjEnd()
+}
+
+// encodeFields encodes fields.
+func (s *PageWithResultsMeta) encodeFields(e *jx.Encoder) {
+	{
+
+		e.FieldStart("title")
+		e.Str(s.Title)
+	}
+	{
+
+		e.FieldStart("description")
+		e.Str(s.Description)
+	}
+	{
+		if s.Error.Set {
+			e.FieldStart("error")
+			s.Error.Encode(e)
+		}
+	}
+}
+
+var jsonFieldsNameOfPageWithResultsMeta = [3]string{
+	0: "title",
+	1: "description",
+	2: "error",
+}
+
+// Decode decodes PageWithResultsMeta from json.
+func (s *PageWithResultsMeta) Decode(d *jx.Decoder) error {
+	if s == nil {
+		return errors.New("invalid: unable to decode PageWithResultsMeta to nil")
+	}
+	var requiredBitSet [1]uint8
+
+	if err := d.ObjBytes(func(d *jx.Decoder, k []byte) error {
+		switch string(k) {
+		case "title":
+			requiredBitSet[0] |= 1 << 0
+			if err := func() error {
+				v, err := d.Str()
+				s.Title = string(v)
+				if err != nil {
+					return err
+				}
+				return nil
+			}(); err != nil {
+				return errors.Wrap(err, "decode field \"title\"")
+			}
+		case "description":
+			requiredBitSet[0] |= 1 << 1
+			if err := func() error {
+				v, err := d.Str()
+				s.Description = string(v)
+				if err != nil {
+					return err
+				}
+				return nil
+			}(); err != nil {
+				return errors.Wrap(err, "decode field \"description\"")
+			}
+		case "error":
+			if err := func() error {
+				s.Error.Reset()
+				if err := s.Error.Decode(d); err != nil {
+					return err
+				}
+				return nil
+			}(); err != nil {
+				return errors.Wrap(err, "decode field \"error\"")
+			}
+		default:
+			return d.Skip()
+		}
+		return nil
+	}); err != nil {
+		return errors.Wrap(err, "decode PageWithResultsMeta")
+	}
+	// Validate required fields.
+	var failures []validate.FieldError
+	for i, mask := range [1]uint8{
+		0b00000011,
+	} {
+		if result := (requiredBitSet[i] & mask) ^ mask; result != 0 {
+			// Mask only required fields and check equality to mask using XOR.
+			//
+			// If XOR result is not zero, result is not equal to expected, so some fields are missed.
+			// Bits of fields which would be set are actually bits of missed fields.
+			missed := bits.OnesCount8(result)
+			for bitN := 0; bitN < missed; bitN++ {
+				bitIdx := bits.TrailingZeros8(result)
+				fieldIdx := i*8 + bitIdx
+				var name string
+				if fieldIdx < len(jsonFieldsNameOfPageWithResultsMeta) {
+					name = jsonFieldsNameOfPageWithResultsMeta[fieldIdx]
+				} else {
+					name = strconv.Itoa(fieldIdx)
+				}
+				failures = append(failures, validate.FieldError{
+					Name:  name,
+					Error: validate.ErrFieldRequired,
+				})
+				// Reset bit.
+				result &^= 1 << bitIdx
+			}
+		}
+	}
+	if len(failures) > 0 {
+		return &validate.Error{Fields: failures}
+	}
+
+	return nil
+}
+
+// MarshalJSON implements stdjson.Marshaler.
+func (s *PageWithResultsMeta) MarshalJSON() ([]byte, error) {
+	e := jx.Encoder{}
+	s.Encode(&e)
+	return e.Bytes(), nil
+}
+
+// UnmarshalJSON implements stdjson.Unmarshaler.
+func (s *PageWithResultsMeta) UnmarshalJSON(data []byte) error {
+	d := jx.DecodeBytes(data)
+	return s.Decode(d)
+}
+
 // Encode encodes Pages as json.
 func (s Pages) Encode(e *jx.Encoder) {
 	unwrapped := []Page(s)

api/openapi/oas_schemas_gen.go

@@ -324,6 +324,7 @@ type Page struct {
 	Created time.Time `json:"created"`
 	Formats []Format  `json:"formats"`
 	Status  Status    `json:"status"`
+	Meta    PageMeta  `json:"meta"`
 }
 
 // GetID returns the value of ID.
@@ -351,6 +352,11 @@ func (s *Page) GetStatus() Status {
 	return s.Status
 }
 
+// GetMeta returns the value of Meta.
+func (s *Page) GetMeta() PageMeta {
+	return s.Meta
+}
+
 // SetID sets the value of ID.
 func (s *Page) SetID(val uuid.UUID) {
 	s.ID = val
@@ -376,17 +382,59 @@ func (s *Page) SetStatus(val Status) {
 	s.Status = val
 }
 
+// SetMeta sets the value of Meta.
+func (s *Page) SetMeta(val PageMeta) {
+	s.Meta = val
+}
+
 func (*Page) addPageRes() {}
 
+type PageMeta struct {
+	Title       string    `json:"title"`
+	Description string    `json:"description"`
+	Error       OptString `json:"error"`
+}
+
+// GetTitle returns the value of Title.
+func (s *PageMeta) GetTitle() string {
+	return s.Title
+}
+
+// GetDescription returns the value of Description.
+func (s *PageMeta) GetDescription() string {
+	return s.Description
+}
+
+// GetError returns the value of Error.
+func (s *PageMeta) GetError() OptString {
+	return s.Error
+}
+
+// SetTitle sets the value of Title.
+func (s *PageMeta) SetTitle(val string) {
+	s.Title = val
+}
+
+// SetDescription sets the value of Description.
+func (s *PageMeta) SetDescription(val string) {
+	s.Description = val
+}
+
+// SetError sets the value of Error.
+func (s *PageMeta) SetError(val OptString) {
+	s.Error = val
+}
+
 // Merged schema.
 // Ref: #/components/schemas/pageWithResults
 type PageWithResults struct {
-	ID      uuid.UUID `json:"id"`
-	URL     string    `json:"url"`
-	Created time.Time `json:"created"`
-	Formats []Format  `json:"formats"`
-	Status  Status    `json:"status"`
-	Results []Result  `json:"results"`
+	ID      uuid.UUID           `json:"id"`
+	URL     string              `json:"url"`
+	Created time.Time           `json:"created"`
+	Formats []Format            `json:"formats"`
+	Status  Status              `json:"status"`
+	Meta    PageWithResultsMeta `json:"meta"`
+	Results []Result            `json:"results"`
 }
 
 // GetID returns the value of ID.
@@ -414,6 +462,11 @@ func (s *PageWithResults) GetStatus() Status {
 	return s.Status
 }
 
+// GetMeta returns the value of Meta.
+func (s *PageWithResults) GetMeta() PageWithResultsMeta {
+	return s.Meta
+}
+
 // GetResults returns the value of Results.
 func (s *PageWithResults) GetResults() []Result {
 	return s.Results
@@ -444,6 +497,11 @@ func (s *PageWithResults) SetStatus(val Status) {
 	s.Status = val
 }
 
+// SetMeta sets the value of Meta.
+func (s *PageWithResults) SetMeta(val PageWithResultsMeta) {
+	s.Meta = val
+}
+
 // SetResults sets the value of Results.
 func (s *PageWithResults) SetResults(val []Result) {
 	s.Results = val
@@ -451,6 +509,42 @@ func (s *PageWithResults) SetResults(val []Result) {
 
 func (*PageWithResults) getPageRes() {}
 
+type PageWithResultsMeta struct {
+	Title       string    `json:"title"`
+	Description string    `json:"description"`
+	Error       OptString `json:"error"`
+}
+
+// GetTitle returns the value of Title.
+func (s *PageWithResultsMeta) GetTitle() string {
+	return s.Title
+}
+
+// GetDescription returns the value of Description.
+func (s *PageWithResultsMeta) GetDescription() string {
+	return s.Description
+}
+
+// GetError returns the value of Error.
+func (s *PageWithResultsMeta) GetError() OptString {
+	return s.Error
+}
+
+// SetTitle sets the value of Title.
+func (s *PageWithResultsMeta) SetTitle(val string) {
+	s.Title = val
+}
+
+// SetDescription sets the value of Description.
+func (s *PageWithResultsMeta) SetDescription(val string) {
+	s.Description = val
+}
+
+// SetError sets the value of Error.
+func (s *PageWithResultsMeta) SetError(val OptString) {
+	s.Error = val
+}
+
 type Pages []Page
 
 // Ref: #/components/schemas/result

application/application.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"strings"
 	"sync"
 	"time"
 
@@ -48,7 +49,8 @@ func NewApplication(cfg config.Config) (Application, error) {
 	worker := entity.NewWorker(workerCh, pageRepo, processor, log.Named("worker"))
 
 	server, err := openapi.NewServer(
-		rest.NewService(pageRepo, workerCh),
+		rest.NewService(pageRepo, workerCh, processor),
+		openapi.WithPathPrefix("/api/v1"),
 		openapi.WithMiddleware(
 			func(r middleware.Request, next middleware.Next) (middleware.Response, error) {
 				start := time.Now()
@@ -79,13 +81,13 @@ func NewApplication(cfg config.Config) (Application, error) {
 		ui := rest.NewUI(cfg.UI)
 
 		httpHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			if ui.IsUIRequest(r) {
-				ui.ServeHTTP(w, r)
+			if strings.HasPrefix(r.URL.Path, "/api/") {
+				server.ServeHTTP(w, r)
 
 				return
 			}
 
-			server.ServeHTTP(w, r)
+			ui.ServeHTTP(w, r)
 		})
 	}
 

config/config.go

@@ -37,19 +37,19 @@ type PDF struct {
 	Grayscale  bool    `env:"GRAYSCALE,default=false"`
 	MediaPrint bool    `env:"MEDIA_PRINT,default=true"`
 	Zoom       float64 `env:"ZOOM,default=1"`
-	Viewport   string  `env:"VIEWPORT,default=1920x1080"`
-	DPI        uint    `env:"DPI,default=300"`
+	Viewport   string  `env:"VIEWPORT,default=1280x720"`
+	DPI        uint    `env:"DPI,default=150"`
 	Filename   string  `env:"FILENAME,default=page.pdf"`
 }
 
 type API struct {
-	Prefix  string `env:"PREFIX,default=/"`
 	Address string `env:"ADDRESS,default=0.0.0.0:5001"`
 }
 
 type UI struct {
 	Enabled bool   `env:"ENABLED,default=true"`
 	Prefix  string `env:"PREFIX,default=/"`
+	Theme   string `env:"THEME,default=basic"`
 }
 
 type DB struct {

entity/page.go

@@ -11,6 +11,7 @@ import (
 
 type Processor interface {
 	Process(ctx context.Context, format Format, url string) Result
+	GetMeta(ctx context.Context, url string) (Meta, error)
 }
 
 type Format uint8
@@ -37,6 +38,12 @@ const (
 	StatusWithErrors
 )
 
+type Meta struct {
+	Title       string
+	Description string
+	Error       string
+}
+
 func NewPage(url string, description string, formats ...Format) *Page {
 	return &Page{
 		ID:          uuid.New(),
@@ -57,6 +64,7 @@ type Page struct {
 	Results     Results
 	Version     uint16
 	Status      Status
+	Meta        Meta
 }
 
 func (p *Page) SetProcessing() {

entity/worker.go

@@ -9,6 +9,7 @@ import (
 
 type Pages interface {
 	Save(ctx context.Context, page *Page) error
+	ListUnprocessed(ctx context.Context) ([]*Page, error)
 }
 
 func NewWorker(ch chan *Page, pages Pages, processor Processor, log *zap.Logger) *Worker {
@@ -27,6 +28,20 @@ func (w *Worker) Start(ctx context.Context, wg *sync.WaitGroup) {
 
 	w.log.Info("starting")
 
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+
+		unprocessed, err := w.pages.ListUnprocessed(ctx)
+		if err != nil {
+			w.log.Error("failed to get unprocessed pages", zap.Error(err))
+		} else {
+			for i := range unprocessed {
+				w.ch <- unprocessed[i]
+			}
+		}
+	}()
+
 	for {
 		select {
 		case <-ctx.Done():

ports/rest/converter.go

@@ -2,6 +2,7 @@ package rest
 
 import (
 	"fmt"
+	"html"
 
 	"github.com/derfenix/webarchive/api/openapi"
 	"github.com/derfenix/webarchive/entity"
@@ -22,6 +23,11 @@ func PageToRestWithResults(page *entity.Page) openapi.PageWithResults {
 			return res
 		}(),
 		Status: StatusToRest(page.Status),
+		Meta: openapi.PageWithResultsMeta{
+			Title:       html.EscapeString(page.Meta.Title),
+			Description: html.EscapeString(page.Meta.Description),
+			Error:       openapi.NewOptString(page.Meta.Error),
+		},
 		Results: func() []openapi.Result {
 			results := make([]openapi.Result, len(page.Results.Results()))
 
@@ -65,6 +71,11 @@ func PageToRest(page *entity.Page) openapi.Page {
 		ID:      page.ID,
 		URL:     page.URL,
 		Created: page.Created,
+		Meta: openapi.PageMeta{
+			Title:       html.EscapeString(page.Meta.Title),
+			Description: html.EscapeString(page.Meta.Description),
+			Error:       openapi.NewOptString(page.Meta.Error),
+		},
 		Formats: func() []openapi.Format {
 			res := make([]openapi.Format, len(page.Formats))
 

ports/rest/service.go

@@ -20,14 +20,19 @@ type Pages interface {
 	GetFile(ctx context.Context, pageID, fileID uuid.UUID) (*entity.File, error)
 }
 
-func NewService(sites Pages, ch chan *entity.Page) *Service {
-	return &Service{pages: sites, ch: ch}
+func NewService(pages Pages, ch chan *entity.Page, processor entity.Processor) *Service {
+	return &Service{
+		pages:     pages,
+		ch:        ch,
+		processor: processor,
+	}
 }
 
 type Service struct {
 	openapi.UnimplementedHandler
-	pages Pages
-	ch    chan *entity.Page
+	pages     Pages
+	ch        chan *entity.Page
+	processor entity.Processor
 }
 
 func (s *Service) GetPage(ctx context.Context, params openapi.GetPageParams) (openapi.GetPageRes, error) {
@@ -78,6 +83,13 @@ func (s *Service) AddPage(ctx context.Context, req openapi.OptAddPageReq, params
 	page := entity.NewPage(url, description, domainFormats...)
 	page.Status = entity.StatusProcessing
 
+	meta, err := s.processor.GetMeta(ctx, page.URL)
+	if err != nil {
+		page.Meta.Error = err.Error()
+	} else {
+		page.Meta = meta
+	}
+
 	if err := s.pages.Save(ctx, page); err != nil {
 		return nil, fmt.Errorf("save page: %w", err)
 	}

ports/rest/ui.go

@@ -10,15 +10,19 @@ import (
 )
 
 func NewUI(cfg config.UI) *UI {
-	return &UI{prefix: cfg.Prefix}
+	return &UI{
+		prefix: cfg.Prefix,
+		theme:  cfg.Theme,
+	}
 }
 
 type UI struct {
 	prefix string
+	theme  string
 }
 
 func (u *UI) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	serveRoot, err := fs.Sub(ui.StaticFiles, "static")
+	serveRoot, err := fs.Sub(ui.StaticFiles, u.theme)
 	if err != nil {
 		w.WriteHeader(http.StatusInternalServerError)
 		return
@@ -27,12 +31,11 @@ func (u *UI) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	if strings.HasPrefix(r.URL.Path, u.prefix) {
 		r.URL.Path = "/" + strings.TrimPrefix(r.URL.Path, u.prefix)
 	}
+	if !strings.HasPrefix(r.URL.Path, "/static") {
+		r.URL.Path = "/"
+	}
 
 	r.URL.Path = strings.TrimPrefix(r.URL.Path, "/static")
 
 	http.FileServer(http.FS(serveRoot)).ServeHTTP(w, r)
 }
-
-func (u *UI) IsUIRequest(r *http.Request) bool {
-	return r.URL.Path == u.prefix || strings.HasPrefix(r.URL.Path, "/static/")
-}

ui/basic/index.html

@@ -0,0 +1,47 @@
+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <title>WebArchive</title>
+    <link rel="stylesheet" href="/static/style.css">
+    <script src="/static/lib.js"></script>
+    <script src="/static/main.js"></script>
+</head>
+<body>
+<template id="pages_tmpl">
+    <div class="page_item">
+        <a class="url link"><span class="title"></span><span class="status"></span></a>
+        <div class="description"></div>
+        <div class="created"></div>
+        <hr>
+    </div>
+</template>
+
+<template id="page_tmpl">
+    <a onclick="history.back()" class="link">Back</a>
+    <div class="page">
+        <h2 id="page_title"></h2>
+        <h3 id="page_description"></h3>
+        <h5 id="page_url" class="link" onclick="window.open(this.innerHTML, '_blank')"></h5>
+        <h4>Results</h4>
+        <div id="results"></div>
+    </div>
+</template>
+
+<template id="result_tmpl">
+    <div class="result_item">
+        <span class="format"></span>
+        <span class="result_link link"></span>
+    </div>
+</template>
+
+<h1 id="site_title"></h1>
+
+<div id="data">
+    None
+</div>
+</body>
+</html>
+

ui/basic/main.js

@@ -0,0 +1,90 @@
+function index() {
+  $.ajax({
+    url: "/api/v1/pages", success: function (data, status, xhr) {
+      if (status !== "success") {
+        gotError(status);
+
+        return;
+      }
+
+      let elem = document.getElementById("data");
+      elem.innerHTML = "";
+      // elem.attachShadow({mode: 'open'});
+
+      data.forEach(function (v) {
+        let page_elem = pages_tmpl.content.cloneNode(true);
+        $(page_elem).find(".url").attr("onclick", "goToPage('" + v.id + "');");
+        $(page_elem).find(".status").addClass(v.status);
+        $(page_elem).find(".status").attr("title", v.status);
+        $(page_elem).find(".created").html(v.created);
+        $(page_elem).find(".title").html(v.meta.title);
+        $(page_elem).find(".description").html(v.meta.description);
+        elem.append(page_elem); // (*)
+      })
+    }
+  })
+}
+
+function goToPage(id) {
+  history.pushState({"page": id}, null, id);
+  page(id);
+}
+
+function page(id) {
+  $.ajax({
+    url: "/api/v1/pages/" + id, success: function (data, status, xhr) {
+      if (status !== "success") {
+        gotError(status);
+
+        return;
+      }
+
+      let elem = document.getElementById("data");
+      elem.innerHTML = "";
+      let page_elem = page_tmpl.content.cloneNode(true);
+      $(page_elem).find("#page_title").html(data.meta.title);
+      $(page_elem).find("#page_description").html(data.meta.description);
+      $(page_elem).find("#page_url").html(data.url);
+
+      data.results.forEach(function (result) {
+        let result_elem = result_tmpl.content.cloneNode(true);
+        $(result_elem).find(".format").html(result.format);
+        if (result.error !== "" && result.error !== undefined) {
+          $(result_elem).find(".format").addClass("error");
+          $(result_elem).find(".result_link").html("⚠");
+          $(result_elem).find(".result_link").attr("title", result.error);
+        } else {
+          result.files.forEach(function (file) {
+            $(result_elem).find(".result_link").attr("onclick", "window.open('/api/v1/pages/" + data.id + "/file/" + file.id + "', '_blank');");
+            $(result_elem).find(".result_link").html(file.name);
+          })
+        }
+
+        $(page_elem).find("#results").append(result_elem);
+      })
+
+      elem.append(page_elem); // (*)
+    }
+  })
+}
+
+function gotError(err) {
+  console.log(err);
+}
+
+document.addEventListener("DOMContentLoaded", function () {
+  $("#site_title").html("WebArchive " + window.location.hostname);
+  document.title = "WebArchive " + window.location.hostname;
+  if (window.location.pathname.endsWith("/")) {
+    index();
+  } else {
+    page(window.location.pathname.slice(1));
+  }
+});
+window.addEventListener('popstate', function (event) {
+  if (event.state === null) {
+    index();
+  } else {
+    page(event.state.page);
+  }
+});

ui/embed.go

@@ -4,5 +4,5 @@ import (
 	"embed"
 )
 
-//go:embed static/*
+//go:embed */*.html */*.css */*.js
 var StaticFiles embed.FS

ui/static/index.html

@@ -1,14 +0,0 @@
-<!doctype html>
-<html lang="en">
-<head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
-    <meta http-equiv="X-UA-Compatible" content="ie=edge">
-    <title>Document</title>
-    <link rel="stylesheet" href="/static/style.css">
-</head>
-<body>
-<h1>Hello World!</h1>
-</body>
-</html>
-

ui/static/style.css

@@ -1,3 +0,0 @@
-h1 {
-    background-color: azure;
-}