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Article contents:== Outdated egg! This is an egg for CHICKEN 3, the unsupported old release. You're almost certainly looking for [[/eggref/4/http-server-form-posts|the CHICKEN 4 version of this egg]], if it exists. If it does not exist, there may be equivalent functionality provided by another egg; have a look at the [[https://wiki.call-cc.org/chicken-projects/egg-index-4.html|egg index]]. Otherwise, please consider porting this egg to the current version of CHICKEN. [[tags:eggs web spiffy html http]] [[toc:]] == http-server-form-posts === Introduction The {{http-server-form-posts}} egg extends the web server available in the {{http-server}} egg to include support for parsing of multipart/form-data form posts. It includes some data structures and utilties for representing and inspecting form posts. === License {{http-server-form-posts}} is in the Public Domain and may be reproduced or copied without permission. === Authors [[/users/Moe Aboulkheir|Moe Aboulkheir]] === Requirements * [[http://code.call-cc.org/legacy-eggs/3/http.html|http-server]] * [[http://code.call-cc.org/legacy-eggs/3/mime.html|mime]] === Examples ==== Canonical Usage <enscript highlight=scheme>(use http-server http-server-form-posts) (http:add-resource "/form-post" (lambda (req args) (let* ((form-fields (request->form-field-alist req)) (file-input (alist-ref "file" form-fields string=?)) (response (string-append "You uploaded a file called " (form-field:file-name file-input) " which has a content type of " (form-field:content-type file-input) ". The contents of this file are: " (form-field:body file-input)))) ; ... write the response ... )))</enscript> === Conversion ==== request->form-field-list [procedure] (request->form-field-list req) Returns a list of {{form-field}} records, one for each form field that has a part in the body of the HTTP request {{req}}, in the same order as the parts appear in the posted document. ==== request->form-field-alist [procedure] (request->form-field-alist req) Same as {{request->form-field-list}}, but returns an association list which maps (string) names of form post parts to {{form-field}} records. ==== form-field-list->form-field-alist [procedure] (form-field-list->form-field-alist req) Converts a form field list (as returned by {{request->form-field-list}}) into the same format as the return value of {{request->form-field-alist}}. === Predicates ==== form-field? [procedure] (form-field? anything) Returns a boolean indicating whether {{anything}} is of the {{form-field}} record type. ==== form-field:file-field? [procedure] (form-field:file-field? form-field) Returns a boolean indicating whether {{form-field}} is a file field/file input (i.e. does its {{content-disposition}} header have a {{filename}} parameter?). === Selectors ==== form-field:name [procedure] (form-field:name form-field) Returns the string name of {{form-field}} (i.e. the value of the {{name}} parameter of the corresponding {{content-disposition}} header). ==== form-field:body [procedure] (form-field:body form-field) Returns the string body of {{form-field}} (i.e. the body of its part in the form post). ==== form-field:content-type [procedure] (form-field:content-type form-field) Returns the string content type of {{form-field}} (i.e. the value of the {{content-type}} header for its part in the form post). ==== form-field:file-name [procedure] (form-field:file-name form-field) Returns the string name of the file whose content is the body of {{form-field}}. Will return {{#f}} if {{form-field}} is not a file field (i.e. if {{(form-field-file-field? form-field)}} does not evaluate to {{#t}}). === History ; 0.2 : fixed missing filename in .setup script [felix] ; 0.1 : initial version Description of your changes:

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