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871ad73414
grafana-plugin-model is legacy and is replaced by new backend plugins SDK and architecture. Renderer is not part of SDK and we want to keep it that way for now since it's highly unlikely there will be more than one kind of renderer plugin. So this PR adds support for renderer plugin v2. Also adds support sending a Device Scale Factor parameter to the plugin v2 remote rendering service and by that replaces #22474. Adds support sending a Headers parameter to the plugin v2 and remote rendering service which for now only include Accect-Language header (the user locale in browser when using Grafana), ref grafana/grafana-image-renderer#45. Fixes health check json details response. Adds image renderer plugin configuration settings in defaults.ini and sample.ini. Co-Authored-By: Arve Knudsen <arve.knudsen@gmail.com>
93 lines
2.5 KiB
Go
93 lines
2.5 KiB
Go
package api
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import (
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"fmt"
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"net/http"
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"runtime"
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"strconv"
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"strings"
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"time"
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"github.com/grafana/grafana/pkg/models"
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"github.com/grafana/grafana/pkg/services/rendering"
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"github.com/grafana/grafana/pkg/util"
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)
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func (hs *HTTPServer) RenderToPng(c *models.ReqContext) {
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queryReader, err := util.NewURLQueryReader(c.Req.URL)
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if err != nil {
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c.Handle(400, "Render parameters error", err)
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return
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}
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queryParams := fmt.Sprintf("?%s", c.Req.URL.RawQuery)
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width, err := strconv.Atoi(queryReader.Get("width", "800"))
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if err != nil {
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c.Handle(400, "Render parameters error", fmt.Errorf("Cannot parse width as int: %s", err))
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return
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}
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height, err := strconv.Atoi(queryReader.Get("height", "400"))
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if err != nil {
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c.Handle(400, "Render parameters error", fmt.Errorf("Cannot parse height as int: %s", err))
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return
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}
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timeout, err := strconv.Atoi(queryReader.Get("timeout", "60"))
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if err != nil {
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c.Handle(400, "Render parameters error", fmt.Errorf("Cannot parse timeout as int: %s", err))
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return
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}
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scale, err := strconv.ParseFloat(queryReader.Get("scale", "1"), 64)
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if err != nil {
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c.Handle(400, "Render parameters error", fmt.Errorf("Cannot parse scale as float: %s", err))
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return
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}
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headers := http.Header{}
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acceptLanguageHeader := c.Req.Header.Values("Accept-Language")
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if len(acceptLanguageHeader) > 0 {
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headers["Accept-Language"] = acceptLanguageHeader
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}
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maxConcurrentLimitForApiCalls := 30
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result, err := hs.RenderService.Render(c.Req.Context(), rendering.Opts{
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Width: width,
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Height: height,
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Timeout: time.Duration(timeout) * time.Second,
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OrgId: c.OrgId,
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UserId: c.UserId,
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OrgRole: c.OrgRole,
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Path: c.Params("*") + queryParams,
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Timezone: queryReader.Get("tz", ""),
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Encoding: queryReader.Get("encoding", ""),
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ConcurrentLimit: maxConcurrentLimitForApiCalls,
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DeviceScaleFactor: scale,
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Headers: headers,
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})
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if err != nil && err == rendering.ErrTimeout {
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c.Handle(500, err.Error(), err)
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return
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}
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if err != nil && err == rendering.ErrPhantomJSNotInstalled {
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if strings.HasPrefix(runtime.GOARCH, "arm") {
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c.Handle(500, "Rendering failed - PhantomJS isn't included in arm build per default", err)
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} else {
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c.Handle(500, "Rendering failed - PhantomJS isn't installed correctly", err)
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}
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return
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}
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if err != nil {
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c.Handle(500, "Rendering failed.", err)
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return
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}
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c.Resp.Header().Set("Content-Type", "image/png")
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http.ServeFile(c.Resp, c.Req.Request, result.FilePath)
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}
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