fix: memory limitations due to 32 bit architecture; now using manual form field/file processing; hopefully it continues to work

internal/handlers/web/documents.go

@@ -6,12 +6,9 @@ import (
 	"fmt"
 	"io"
 	"log"
-	"mime/multipart"
 	"net/http"
 	"path/filepath"
-	"regexp"
 	"sort"
-	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -197,25 +194,84 @@ func UploadDocumentsHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Parse the multipart form with a 30MB limit
-	if err := r.ParseMultipartForm(30 << 20); err != nil {
-		http.Error(w, fmt.Sprintf("Unable to parse form: %v", err), http.StatusBadRequest)
+	// Custom multipart form processing for 32-bit systems
+	reader, err := r.MultipartReader()
+	if err != nil {
+		http.Error(w, "Unable to get multipart reader: "+err.Error(), http.StatusBadRequest)
 		return
 	}
 
-	// Get the job numbers from either of the possible form fields
-	jobNumbers := r.FormValue("jobNumbers")
+	// Store form values and file parts
+	formValues := make(map[string]string)
+
+	// Read all file contents
+	type DocumentWithContent struct {
+		Name        string
+		Type        string
+		FileContent []byte
+		FormField   string // Store the original form field name
+	}
+	var docsWithContent []DocumentWithContent
+
+	// First pass: collect all form fields and files
+	log.Printf("--- Starting multipart form processing ---")
+	for {
+		part, err := reader.NextPart()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			log.Printf("Error reading multipart part: %v", err)
+			break
+		}
+
+		formName := part.FormName()
+		fileName := part.FileName()
+
+		// If not a file, it's a regular form value
+		if fileName == "" {
+			// Read the form field value
+			valueBytes, err := io.ReadAll(part)
+			if err != nil {
+				log.Printf("Error reading form field %s: %v", formName, err)
+				continue
+			}
+			value := string(valueBytes)
+			formValues[formName] = value
+			log.Printf("Form field: %s = %s", formName, value)
+		} else if strings.HasPrefix(formName, "document-file-") {
+			// It's a file upload field
+			// Read file content
+			fileContent, err := io.ReadAll(part)
+			if err != nil {
+				log.Printf("Error reading file content for %s: %v", fileName, err)
+				continue
+			}
+
+			log.Printf("Found file: %s (size: %d bytes) in field: %s",
+				fileName, len(fileContent), formName)
+
+			// Store the file with its original field name for later processing
+			docsWithContent = append(docsWithContent, DocumentWithContent{
+				Name:        fileName, // Default to original filename, will be updated with form values
+				Type:        "",       // Will be set from form values
+				FileContent: fileContent,
+				FormField:   formName,
+			})
+		}
+	}
+
+	// Get job numbers from form values
+	jobNumbers := formValues["jobNumbers"]
 	if jobNumbers == "" {
-		jobNumbers = r.FormValue("job-ids")
+		jobNumbers = formValues["job-ids"]
 		if jobNumbers == "" {
-			log.Printf("No job numbers provided. Form data: %+v", r.Form)
+			log.Printf("No job numbers found in form values: %+v", formValues)
 			http.Error(w, "No job numbers provided", http.StatusBadRequest)
 			return
 		}
 	}
 
-	// Log the form data for debugging
-	log.Printf("Form data: %+v", r.Form)
 	log.Printf("Job numbers: %s", jobNumbers)
 
 	// Split the job numbers
@@ -225,110 +281,51 @@ func UploadDocumentsHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Regular expression to match file field patterns
-	filePattern := regexp.MustCompile(`document-file-(\d+)`)
-
-	// Collect document data
-	type DocumentData struct {
-		File   multipart.File
-		Header *multipart.FileHeader
-		Name   string
-		Type   string
-		Index  int
-	}
+	// Second pass: process document metadata
+	for i, doc := range docsWithContent {
+		suffix := strings.TrimPrefix(doc.FormField, "document-file-")
+		nameField := "document-name-" + suffix
+		typeField := "document-type-" + suffix
 
-	var documents []DocumentData
-
-	// First, identify all available indices
-	var indices []int
-	for key := range r.MultipartForm.File {
-		if matches := filePattern.FindStringSubmatch(key); len(matches) > 1 {
-			if index, err := strconv.Atoi(matches[1]); err == nil {
-				indices = append(indices, index)
-			}
-		}
-	}
-
-	// Process each document
-	for _, index := range indices {
-		fileKey := fmt.Sprintf("document-file-%d", index)
-		nameKey := fmt.Sprintf("document-name-%d", index)
-		typeKey := fmt.Sprintf("document-type-%d", index)
-
-		fileHeaders := r.MultipartForm.File[fileKey]
-		if len(fileHeaders) == 0 {
-			continue // Skip if no file uploaded
-		}
-
-		fileHeader := fileHeaders[0]
-		file, err := fileHeader.Open()
-		if err != nil {
-			log.Printf("Error opening file %s: %v", fileHeader.Filename, err)
-			continue
-		}
-
-		// Get document name (use filename if not provided)
-		documentName := r.FormValue(nameKey)
-		if documentName == "" {
-			documentName = fileHeader.Filename
-		} else {
+		// Get custom document name if provided
+		customName := formValues[nameField]
+		if customName != "" {
 			// If a custom name is provided without extension, add the original file extension
-			if !strings.Contains(documentName, ".") {
-				extension := filepath.Ext(fileHeader.Filename)
+			if !strings.Contains(customName, ".") {
+				extension := filepath.Ext(doc.Name)
 				if extension != "" {
-					documentName = documentName + extension
+					customName = customName + extension
 				}
 			}
+			docsWithContent[i].Name = customName
 		}
 
-		log.Printf("Using document name: %s (original filename: %s)", documentName, fileHeader.Filename)
-
 		// Get document type
-		documentType := r.FormValue(typeKey)
-		if documentType == "" {
-			log.Printf("No document type for file %s", fileHeader.Filename)
+		docType := formValues[typeField]
+		if docType == "" {
+			log.Printf("No document type for file %s, skipping", doc.Name)
 			continue
 		}
 
-		// Log the document type for debugging
-		log.Printf("Document type for %s: '%s'", documentName, documentType)
-
-		documents = append(documents, DocumentData{
-			File:   file,
-			Header: fileHeader,
-			Name:   documentName,
-			Type:   documentType,
-			Index:  index,
-		})
+		docsWithContent[i].Type = docType
+		log.Printf("Processing document: %s (type: %s) from field: %s",
+			docsWithContent[i].Name, docType, doc.FormField)
 	}
 
-	if len(documents) == 0 {
-		http.Error(w, "No valid documents selected for upload", http.StatusBadRequest)
-		return
+	// Filter out documents with no type
+	var validDocs []DocumentWithContent
+	for _, doc := range docsWithContent {
+		if doc.Type != "" {
+			validDocs = append(validDocs, doc)
 		}
-
-	// Read all file contents first to avoid keeping files open during concurrent uploads
-	type DocumentWithContent struct {
-		Name        string
-		Type        string
-		FileContent []byte
 	}
+	docsWithContent = validDocs
 
-	var docsWithContent []DocumentWithContent
-	for _, doc := range documents {
-		// Read file content
-		fileContent, err := io.ReadAll(doc.File)
-		if err != nil {
-			log.Printf("Error reading file %s: %v", doc.Header.Filename, err)
-			continue
-		}
-		doc.File.Close() // Close the file as soon as we're done with it
+	log.Printf("Total valid documents to upload: %d", len(docsWithContent))
 
-		docsWithContent = append(docsWithContent, DocumentWithContent{
-			Name:        doc.Name,
-			Type:        doc.Type,
-			FileContent: fileContent,
-		})
+	if len(docsWithContent) == 0 {
+		http.Error(w, "No valid documents selected for upload", http.StatusBadRequest)
+		return
 	}
 
 	// Concurrent upload with throttling