feat: new httpheader macro (and test) for sasjs/server

server/mfs_httpheader.sas

@@ -0,0 +1,52 @@
+/**
+  @file
+  @brief Sets the http headers in the SASjs/server response
+  @details For GET requests, SASjs server will use the file generated by this
+  macro for setting the appropriate http headers in the response.
+
+  It works by writing a file to the session directory, that is then ingested by
+  the server.
+
+  The location of this file is driven by the global variable
+  `sasjs_stpsrv_header_loc` which is made available in the autoexec.
+
+  Usage:
+
+      %mfs_httpheader(Content-type,application/csv)
+
+  @param [in] header_name Name of the http header to set
+  @param [in] header_value Value of the http header to set
+
+  <h4> Related Macros </h4>
+  @li mcf_stpsrv_header.sas
+
+  @version 9.3
+  @author Allan Bowe
+
+**/
+
+%macro mfs_httpheader(header_name
+  ,header_value
+)/*/STORE SOURCE*/;
+%local fref fid i;
+
+%if %sysfunc(filename(fref,&sasjs_stpsrv_header_loc)) ne 0 %then %do;
+  %put &=fref &=sasjs_stpsrv_header_loc;
+  %put %str(ERR)OR: %sysfunc(sysmsg());
+  %return;
+%end;
+
+%let fid=%sysfunc(fopen(&fref,A));
+
+%if &fid=0 %then %do;
+  %put %str(ERR)OR: %sysfunc(sysmsg());
+  %return;
+%end;
+
+%let rc=%sysfunc(fput(&fid,%str(&header_name): %str(&header_value)));
+%let rc=%sysfunc(fwrite(&fid));
+
+%let rc=%sysfunc(fclose(&fid));
+%let rc=%sysfunc(filename(&fref));
+
+%mend mfs_httpheader;

tests/serveronly/mfs_httpheader.test.sas

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+/**
+  @file
+  @brief Testing mfs_httpheader.sas macro
+
+  <h4> SAS Macros </h4>
+  @li mfs_httpheader.sas
+  @li mp_assert.sas
+
+**/
+
+%let sasjs_stpsrv_header_loc=%sysfunc(pathname(work))/header.txt;
+
+%mfs_httpheader(Content-type,application/csv)
+data _null_;
+  infile "&sasjs_stpsrv_header_loc";
+  input;
+  if _n_=1 then call symputx('test1',_infile_);
+run;
+
+%mp_assert(
+  iftrue=(&syscc=0),
+  desc=Check code ran without errors,
+  outds=work.test_results
+)
+%mp_assert(
+  iftrue=("&test1"="Content-type: application/csv"),
+  desc=Checking line was created,
+  outds=work.test_results
+)
+
+%mfs_httpheader(Content-type,application/text)
+%let test2=0;
+data _null_;
+  infile "&sasjs_stpsrv_header_loc";
+  input;
+  if _n_=2 then call symputx('test2',_infile_);
+run;
+
+%mp_assert(
+  iftrue=(&syscc=0),
+  desc=Check code ran without errors for test2,
+  outds=work.test_results
+)
+%mp_assert(
+  iftrue=("&test2"="Content-type: application/text"),
+  desc=Checking line was created,
+  outds=work.test_results
+)