diff --git a/.gitignore b/.gitignore index a0c5c1f..3f3d64f 100644 --- a/.gitignore +++ b/.gitignore @@ -13,3 +13,5 @@ external/cmd/helpers/emailtouser/emailtouser external/cmd/helpers/createkeyfile/createkeyfile external/cmd/helpers/registeruser/registeruser external/cmd/helpers/appendkeyfile/appendkeyfile +share/share +share/uploads diff --git a/share/README.md b/share/README.md new file mode 100644 index 0000000..056d284 --- /dev/null +++ b/share/README.md @@ -0,0 +1,69 @@ +# town share + +_being a way to share multimedia with each other that mimics rot_ + +sometimes, townies want to share images and videos with each other. + +this leads to a set of behaviors: + +- using a corporate photo album soft ware to create a public link (feels antithetical to town culture) +- uploading to a photo sharing site to get a link (there aren't a ton of these left, many are shady) +- SCPing a photo to town (clumsy when you just want to share from phone, uses disk space inefficiently) + +though this is not a bleeding wound of a community issue, it is one that makes me itch. a kind of mosquito bite. + +i do not wish to be in the business of just hosting people's massive photos. that sounds unfun and annoying. + +however, i _do_ wish to be in the business of hosting artfully lossy versions of people's photos. the business grows even tastier if those photos rot -- one pixel at a time, perhaps -- until there's nothing left. disk usage should always converge on zero. the undifferentiated smear of a brown leafed forest floor. better yet: every photo leaves a unique stain of pixels. storage compact, just enough to say "there was a thing here. here's what is left." + +## the flow + +1. user has a picture they want to share with a persistent, easy to copy and paste url +2. user opens a webpage, https://share.tilde.town, which has an "upload image" form at the top +3. they select a style, one of: + a. dithered + b. heavily compressed + c. 1 bit + d. ascii art +4. they choose whether or not to secretify this upload +5. the image is uploaded; the bits are stored somewhere (disk or blob storage) and its initial checksum is saved as a seed value +6. the user is redirected to their photo + +meanwhile, a cron job rots the photos on disk. an array of pixel values is computed based on the original checksum: these pixels are sacred and uncorruptible. N random cells are rotted (fewer for ascii art). fully rotted images are noted as done and ignored by the cron job. + +## a bugaboo + +i want to think through authentication. my first thought was that this would be fully public. sure, that's an option. but it will keep me up at night. + +better that townies all have a secret unique to them they can print out while on server for storage in a cookie. that cookie lets them upload. it also generates galleries for them including the uploads not marked as secretified. + +thus, https://share.tilde.town/~vilmibm will have my photos flowed on out. + +## cli tool + +town share has a corresponding CLI tool for use on or off the town. it reads the same secret used on the web site and uploads the image to the server. + +``` +$ town-share foo.jpg +flavor: 1. dithering 2. heavy compression 3. 1 bit 4. ascii art +include in web galley? Yn + +file's done. + +https://share.tilde.town/~vilmibm/abc123.gif +``` + +## future dreams + +the big future dream is to handle other forms of media -- video and sound. but to start I am happy with just images. + +## the questions + +- what image format to use in storage? iirc the dithering tricks only work for gif so that's easy. ascii art is txt. maybe heavy compression can be jpg? 1 bit could be a bmp..? +- where to store files? + - duh -- in people's home dirs. if they want to delete an image, remove it from the directory. + - this has the side effect of letting people put arbitrary images into the directory; i think that's a feature not a bug. +- what format for image names? + - initially i had the thought they should be date sorted. but, why! fuck that, just lexigraphically sort and let the filename be a random hash of some kind. something like: 8 digits, alphanumeric, dash in the middle, extension +- what sort of secret? i can just mimic whatever i do for invite codes. +- what state is required beyond the files? i want a notion of "done" for rotting. that could be a file size. ie, rot until a file is below a certain size. since the whole point of rotting (in addition to aesthetics/philosophy/lulz) is to reduce disk impact over time, file size should be the indication of whether further rot is required. diff --git a/share/go.mod b/share/go.mod new file mode 100644 index 0000000..eaa512a --- /dev/null +++ b/share/go.mod @@ -0,0 +1,37 @@ +module git.tilde.town/tildetown/share + +go 1.24 + +require ( + github.com/gin-gonic/gin v1.10.0 + github.com/google/uuid v1.6.0 +) + +require ( + github.com/bytedance/sonic v1.11.6 // indirect + github.com/bytedance/sonic/loader v0.1.1 // indirect + github.com/cloudwego/base64x v0.1.4 // indirect + github.com/cloudwego/iasm v0.2.0 // indirect + github.com/gabriel-vasile/mimetype v1.4.3 // indirect + github.com/gin-contrib/sse v0.1.0 // indirect + github.com/go-playground/locales v0.14.1 // indirect + github.com/go-playground/universal-translator v0.18.1 // indirect + github.com/go-playground/validator/v10 v10.20.0 // indirect + github.com/goccy/go-json v0.10.2 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/klauspost/cpuid/v2 v2.2.7 // indirect + github.com/leodido/go-urn v1.4.0 // indirect + github.com/mattn/go-isatty v0.0.20 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/pelletier/go-toml/v2 v2.2.2 // indirect + github.com/twitchyliquid64/golang-asm v0.15.1 // indirect + github.com/ugorji/go/codec v1.2.12 // indirect + golang.org/x/arch v0.8.0 // indirect + golang.org/x/crypto v0.23.0 // indirect + golang.org/x/net v0.25.0 // indirect + golang.org/x/sys v0.20.0 // indirect + golang.org/x/text v0.15.0 // indirect + google.golang.org/protobuf v1.34.1 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/share/go.sum b/share/go.sum new file mode 100644 index 0000000..9e6f56a --- /dev/null +++ b/share/go.sum @@ -0,0 +1,91 @@ +github.com/bytedance/sonic v1.11.6 h1:oUp34TzMlL+OY1OUWxHqsdkgC/Zfc85zGqw9siXjrc0= +github.com/bytedance/sonic v1.11.6/go.mod h1:LysEHSvpvDySVdC2f87zGWf6CIKJcAvqab1ZaiQtds4= +github.com/bytedance/sonic/loader v0.1.1 h1:c+e5Pt1k/cy5wMveRDyk2X4B9hF4g7an8N3zCYjJFNM= +github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU= +github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/0Y= +github.com/cloudwego/base64x v0.1.4/go.mod h1:0zlkT4Wn5C6NdauXdJRhSKRlJvmclQ1hhJgA0rcu/8w= +github.com/cloudwego/iasm v0.2.0 h1:1KNIy1I1H9hNNFEEH3DVnI4UujN+1zjpuk6gwHLTssg= +github.com/cloudwego/iasm v0.2.0/go.mod h1:8rXZaNYT2n95jn+zTI1sDr+IgcD2GVs0nlbbQPiEFhY= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew 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+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50= +rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4= diff --git a/share/main.go b/share/main.go new file mode 100644 index 0000000..4151c59 --- /dev/null +++ b/share/main.go @@ -0,0 +1,107 @@ +package main + +import ( + "fmt" + "io" + "net/http" + "os" + "path/filepath" + "time" + + "github.com/gin-gonic/gin" + "github.com/google/uuid" +) + +const ( + UPLOAD_DIR = "./uploads" + MAX_FILE_SIZE = 10 << 20 +) + +func main() { + if err := os.MkdirAll(UPLOAD_DIR, 0755); err != nil { + panic(fmt.Sprintf("Failed to create upload directory: %v", err)) + } + + router := gin.Default() + + router.LoadHTMLGlob("templates/*") + + router.GET("/", homeHandler) + router.POST("/upload", uploadHandler) + + router.Static("/static", "./static") + + router.Run(":8787") +} + +func homeHandler(c *gin.Context) { + c.HTML(http.StatusOK, "index.html", gin.H{ + "title": "town share", + }) +} + +func uploadHandler(c *gin.Context) { + file, header, err := c.Request.FormFile("image") + if err != nil { + renderError(c, "melancholy") + return + } + defer file.Close() + + if header.Size > MAX_FILE_SIZE { + renderError(c, "max size is 10mb") + return + } + + contentType := header.Header.Get("Content-Type") + if !isValidImageType(contentType) { + renderError(c, "only jpg, png, and gif are supported") + return + } + + // TODO tweak this + extension := filepath.Ext(header.Filename) + uniqueFilename := fmt.Sprintf("%s-%s%s", + uuid.New().String(), + time.Now().Format("20060102-150405"), + extension, + ) + + destPath := filepath.Join(UPLOAD_DIR, uniqueFilename) + dest, err := os.Create(destPath) + if err != nil { + renderError(c, "Failed to save file") + return + } + defer dest.Close() + + if _, err := io.Copy(dest, file); err != nil { + renderError(c, "Failed to save file") + return + } + + // TODO global const for title + c.HTML(http.StatusOK, "index.html", gin.H{ + "title": "town share", + "success": fmt.Sprintf("file uploaded successfully as %s", uniqueFilename), + }) +} + +// renderError renders the home page with an error message +func renderError(c *gin.Context, message string) { + c.HTML(http.StatusOK, "index.html", gin.H{ + "title": "town share", + "error": message, + }) +} + +// isValidImageType checks if the content type is a supported image format +func isValidImageType(contentType string) bool { + validTypes := map[string]bool{ + "image/jpeg": true, + "image/jpg": true, + "image/png": true, + "image/gif": true, + } + return validTypes[contentType] +} diff --git a/share/templates/index.html b/share/templates/index.html new file mode 100644 index 0000000..6e4e6b4 --- /dev/null +++ b/share/templates/index.html @@ -0,0 +1,87 @@ + + +
+ + +