<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 29 Oct 2018, at 23:44, Jonathan Esterhazy <<a href="mailto:jonathan.esterhazy@gmail.com" class="">jonathan.esterhazy@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div class="">Hello!</div><div class=""><br class=""></div><div class="">I am trying to use njs (ngx_http_js_module) to modify POSTed request data before sending to an upstream api. Using the req.requestBody function works fine for small requests, but for larger ones causes this error:<br class=""></div><div class=""><br class=""></div><div class="">[error] 14#14: *18 js exception: Error: request body is in a file<br class=""></div><div class=""><br class=""></div><div class="">If I was using the Lua module, I could use ngx.req.get-body_file function to get this data, but there doesn't seem to be any way to do that in njs. Did I miss something? Is there a way to access the data or find out the filename?<br class=""></div></div></div></div></div></blockquote><div><br class=""></div><div><br class=""></div><div>Hi Jonathan!</div><div><br class=""></div><div>You have two options here:</div><div><br class=""></div><div>1) you can increase the client buffers</div><div><br class=""></div><div>According to the documentation:</div><div><div><a href="http://nginx.org/en/docs/njs/reference.html#http" class="">http://nginx.org/en/docs/njs/reference.html#http</a></div><div class=""><br class=""></div></div><div><div>r.requestBody</div><div>returns the client request body if it has not been written to a temporary file. To ensure that the client request body is in memory, its size should be limited by client_max_body_size, and a sufficient buffer size should be set using client_body_buffer_size.</div></div><div><br class=""></div><div>2) you can open the file with the client’s request using request_body_file variable (<a href="http://nginx.org/en/docs/http/ngx_http_core_module.html#var_request_body_file" class="">http://nginx.org/en/docs/http/ngx_http_core_module.html#var_request_body_file</a>)</div><div><br class=""></div><div>var fs = require(‘fs’);</div><div>var large_body = fs.readFileSync(r.variables.request_body_file)</div><div><br class=""></div><br class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><br class=""></div></div></div>
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