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/plaintextmachine/plaintextmachine/plaintextmachine.go

https://code.google.com/p/plain-text-machine/
Go | 116 lines | 94 code | 13 blank | 9 comment | 29 complexity | a9093548b40c933a2fb18f1f5a601cf2 MD5 | raw file
    

  1. package plaintextmachine
    2. 

  2. 

  3. import (
    4. 

  4. 	"fmt"
    5. 

  5. 	"http"
    6. 

  6. 	"utf8"
    7. 

  7. )
    8. 

  8. 

  9. var editorHeader = "<!DOCTYPE html>\n" +
    10. 

  10. 		"<html><head><title>The Plain Text Machine</title>" +
    11. 

  11. 		"<style>body { " +
    12. 

  12. 			"font-family: Andale Mono, Courier New, Courier, monospace; " +
    13. 

  13. 			"margin-right: 10%; " +
    14. 

  14. 			"margin-left: 10%; " +
    15. 

  15. 			"margin-top: 2em; " +
    16. 

  16. 			"line-height: 130%; " +
    17. 

  17. 		"}" +
    18. 

  18. 		"textarea {" +
    19. 

  19. 			"font-family: Andale Mono, Courier New, Courier, monospace; " +
    20. 

  20. 		"}" +
    21. 

  21. 		"</style>"
    22. 

  22. 

  23. var textHeader = "<!DOCTYPE html>\n" +
    24. 

  24. 		"<html><head>" +
    25. 

  25. 		"<style>body { " +
    26. 

  26. 			"font-family: Andale Mono, Courier New, Courier, monospace; " +
    27. 

  27. 			"margin-right: 10%; " +
    28. 

  28. 			"margin-left: 10%; " +
    29. 

  29. 			"margin-top: 2em; " +
    30. 

  30. 			"line-height: 130%; " +
    31. 

  31. 		"}" +
    32. 

  32. 		"</style>"
    33. 

  33. 

  34. var script = "<script>" +
    35. 

  35. 		"function generate() {" +
    36. 

  36. 			"var input = document.getElementById('message');" +
    37. 

  37. 			"var output = document.getElementById('link');" +
    38. 

  38. 			"var escaped = " +
    39. 

  39. 				"encodeURIComponent(input.value).replace(/%20/g, '+');" +
    40. 

  40. 			"if (escaped.length > 2000) {" +
    41. 

  41. 				"output.innerHTML = 'Message is too long by ' + " +
    42. 

  42. 					"(escaped.length - 2000) + ' characters.'" +
    43. 

  43. 			"} else {" +
    44. 

  44. 				"output.innerHTML = '<a href=\"/show?msg=' + " +
    45. 

  45. 					"escaped +'\">Show Your Message</a>';" +
    46. 

  46. 			"}" +
    47. 

  47. 		"}" +
    48. 

  48. 		"</script>"
    49. 

  49. 

  50. var middle = "</head><body>"
    51. 

  51. 

  52. var form = "<h1>The Plain Text Machine</h1>Enter your message:<br>" +
    53. 

  53. 		"<textarea id=\"message\" cols=\"80\" rows=\"20\"></textarea><br>" +
    54. 

  54. 		"<button onclick=\"generate()\">Generate Link</button><br>" +
    55. 

  55. 		"<div id=\"link\"></div>"
    56. 

  56. 

  57. var footer = "</body></html>"
    58. 

  58. 

  59. func PrintHtml(text *utf8.String, out http.ResponseWriter) {
    60. 

  60. 	spaces := false
    61. 

  61. 	
    62. 

  62. 	fmt.Fprint(out, textHeader, middle)
    63. 

  63. 	for i := 0; i < text.RuneCount(); i++ {
    64. 

  64. 		currentChar := text.At(i)
    65. 

  65. 	
    66. 

  66. 		if currentChar == 32 && !spaces {
    67. 

  67. 			// A first space.
    68. 

  68. 			fmt.Fprint(out, " ")
    69. 

  69. 			spaces = true
    70. 

  70. 		} else {
    71. 

  71. 			if currentChar == 32 {
    72. 

  72. 				// Space following another space
    73. 

  73. 				fmt.Fprint(out, "&nbsp;")
    74. 

  74. 			} else if currentChar == 10 {
    75. 

  75. 				// Newline
    76. 

  76. 				fmt.Fprint(out, "<br>")
    77. 

  77. 			} else if currentChar == 9 {
    78. 

  78. 				// Tab
    79. 

  79. 				fmt.Fprint(out, "&nbsp;&nbsp;&nbsp; ")
    80. 

  80. 			} else if currentChar == 38 {
    81. 

  81. 				// &
    82. 

  82. 				fmt.Fprint(out, "&amp;")
    83. 

  83. 			} else if currentChar == 60 {
    84. 

  84. 				// <
    85. 

  85. 				fmt.Fprint(out, "&lt;")
    86. 

  86. 			} else if currentChar == 62 {
    87. 

  87. 				// >
    88. 

  88. 				fmt.Fprint(out, "&gt;")
    89. 

  89. 			} else if currentChar < 31 || currentChar == 128 {
    90. 

  90. 				// Skip control characters.
    91. 

  91. 			} else if currentChar < 127 {
    92. 

  92. 				fmt.Fprintf(out, "%c", currentChar)
    93. 

  93. 			} else {
    94. 

  94. 				fmt.Fprintf(out, "&#%d;", text.At(i))
    95. 

  95. 			}
    96. 

  96. 			spaces = false
    97. 

  97. 		}
    98. 

  98. 	}
    99. 

  99. 	fmt.Fprint(out, footer)
    100. 

  100. }
    101. 

  101. 

  102. func show(w http.ResponseWriter, r *http.Request) {
    103. 

  103. 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
    104. 

  104. 	// Get the message from the URL.
    105. 

  105. 	PrintHtml(utf8.NewString(r.FormValue("msg")), w)
    106. 

  106. }
    107. 

  107. 

  108. func handle(w http.ResponseWriter, r *http.Request) {
    109. 

  109. 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
    110. 

  110. 	fmt.Fprint(w, editorHeader, script, middle, form, footer)
    111. 

  111. }
    112. 

  112. 

  113. func init() {
    114. 

  114. 	http.HandleFunc("/", handle)
    115. 

  115. 	http.HandleFunc("/show", show)
    116. 

  116. }
    117. 

  117.